Home / 15,747.84-21,743.04-9,781.92

Finding the Fourth Proportional to 15,747.84, 21,743.04 and 9,781.92

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Solution

The fourth proportional to 15,747.84, 21,743.04 and 9,781.92 is: 13,505.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.84 : 21,743.04 = 9,781.92 : x
  2. Step 2: Convert to fraction form
    15,747.84/21,743.04 = 9,781.92/x
  3. Step 3: Cross multiply
    15,747.84x = 21,743.04 × 9,781.92
  4. Step 4: Simplify right side
    15,747.84x = 212,688,677.84
  5. Step 5: Solve for x
    x = 212,688,677.84/15,747.84
  6. Step 6: Final answer
    x = 13,505.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.