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Finding the Fourth Proportional to 21,308,043,913.80, 31,962,065,870.70 and 21,308,043,913.80

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Solution

The fourth proportional to 21,308,043,913.80, 31,962,065,870.70 and 21,308,043,913.80 is: 31,962,065,870.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308,043,913.80 : 31,962,065,870.70 = 21,308,043,913.80 : x
  2. Step 2: Convert to fraction form
    21,308,043,913.80/31,962,065,870.70 = 21,308,043,913.80/x
  3. Step 3: Cross multiply
    21,308,043,913.80x = 31,962,065,870.70 × 21,308,043,913.80
  4. Step 4: Simplify right side
    21,308,043,913.80x = 681,049,103,148,643,778,560
  5. Step 5: Solve for x
    x = 681,049,103,148,643,778,560/21,308,043,913.80
  6. Step 6: Final answer
    x = 31,962,065,870.70

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.