Home / 21,021,328.80-31,531,993.20-19,745,870.40

Finding the Fourth Proportional to 21,021,328.80, 31,531,993.20 and 19,745,870.40

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Solution

The fourth proportional to 21,021,328.80, 31,531,993.20 and 19,745,870.40 is: 29,618,805.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021,328.80 : 31,531,993.20 = 19,745,870.40 : x
  2. Step 2: Convert to fraction form
    21,021,328.80/31,531,993.20 = 19,745,870.40/x
  3. Step 3: Cross multiply
    21,021,328.80x = 31,531,993.20 × 19,745,870.40
  4. Step 4: Simplify right side
    21,021,328.80x = 622,626,651,180,881.25
  5. Step 5: Solve for x
    x = 622,626,651,180,881.25/21,021,328.80
  6. Step 6: Final answer
    x = 29,618,805.60

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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.