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Finding the Fourth Proportional to 28,424.88, 39,229.20 and 16,490.88

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Solution

The fourth proportional to 28,424.88, 39,229.20 and 16,490.88 is: 22,759.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,424.88 : 39,229.20 = 16,490.88 : x
  2. Step 2: Convert to fraction form
    28,424.88/39,229.20 = 16,490.88/x
  3. Step 3: Cross multiply
    28,424.88x = 39,229.20 × 16,490.88
  4. Step 4: Simplify right side
    28,424.88x = 646,924,029.70
  5. Step 5: Solve for x
    x = 646,924,029.70/28,424.88
  6. Step 6: Final answer
    x = 22,759.08

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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.