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Finding the Fourth Proportional to 28,479.52, 39,302.52 and 15,905.08

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Solution

The fourth proportional to 28,479.52, 39,302.52 and 15,905.08 is: 21,949.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.52 : 39,302.52 = 15,905.08 : x
  2. Step 2: Convert to fraction form
    28,479.52/39,302.52 = 15,905.08/x
  3. Step 3: Cross multiply
    28,479.52x = 39,302.52 × 15,905.08
  4. Step 4: Simplify right side
    28,479.52x = 625,109,724.80
  5. Step 5: Solve for x
    x = 625,109,724.80/28,479.52
  6. Step 6: Final answer
    x = 21,949.45

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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.