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Finding the Fourth Proportional to 28,691.84, 39,632.15 and 22,059.02

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Solution

The fourth proportional to 28,691.84, 39,632.15 and 22,059.02 is: 30,470.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.84 : 39,632.15 = 22,059.02 : x
  2. Step 2: Convert to fraction form
    28,691.84/39,632.15 = 22,059.02/x
  3. Step 3: Cross multiply
    28,691.84x = 39,632.15 × 22,059.02
  4. Step 4: Simplify right side
    28,691.84x = 874,246,389.49
  5. Step 5: Solve for x
    x = 874,246,389.49/28,691.84
  6. Step 6: Final answer
    x = 30,470.21

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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.