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Finding the Fourth Proportional to 20,880,281.20, 31,320,421.80 and 20,880,281.20

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Solution

The fourth proportional to 20,880,281.20, 31,320,421.80 and 20,880,281.20 is: 31,320,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880,281.20 : 31,320,421.80 = 20,880,281.20 : x
  2. Step 2: Convert to fraction form
    20,880,281.20/31,320,421.80 = 20,880,281.20/x
  3. Step 3: Cross multiply
    20,880,281.20x = 31,320,421.80 × 20,880,281.20
  4. Step 4: Simplify right side
    20,880,281.20x = 653,979,214,486,610.12
  5. Step 5: Solve for x
    x = 653,979,214,486,610.12/20,880,281.20
  6. Step 6: Final answer
    x = 31,320,421.80

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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.