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Finding the Fourth Proportional to 28,471.65, 39,287.89 and 16,532.65

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Solution

The fourth proportional to 28,471.65, 39,287.89 and 16,532.65 is: 22,813.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,471.65 : 39,287.89 = 16,532.65 : x
  2. Step 2: Convert to fraction form
    28,471.65/39,287.89 = 16,532.65/x
  3. Step 3: Cross multiply
    28,471.65x = 39,287.89 × 16,532.65
  4. Step 4: Simplify right side
    28,471.65x = 649,532,934.61
  5. Step 5: Solve for x
    x = 649,532,934.61/28,471.65
  6. Step 6: Final answer
    x = 22,813.32

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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.