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Finding the Fourth Proportional to 28,238.61, 42,332.74 and 10,720.74

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Solution

The fourth proportional to 28,238.61, 42,332.74 and 10,720.74 is: 16,071.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.61 : 42,332.74 = 10,720.74 : x
  2. Step 2: Convert to fraction form
    28,238.61/42,332.74 = 10,720.74/x
  3. Step 3: Cross multiply
    28,238.61x = 42,332.74 × 10,720.74
  4. Step 4: Simplify right side
    28,238.61x = 453,838,253.16
  5. Step 5: Solve for x
    x = 453,838,253.16/28,238.61
  6. Step 6: Final answer
    x = 16,071.55

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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.