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Finding the Fourth Proportional to 28,593.65, 39,458.76 and 15,672.80

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Solution

The fourth proportional to 28,593.65, 39,458.76 and 15,672.80 is: 21,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,593.65 : 39,458.76 = 15,672.80 : x
  2. Step 2: Convert to fraction form
    28,593.65/39,458.76 = 15,672.80/x
  3. Step 3: Cross multiply
    28,593.65x = 39,458.76 × 15,672.80
  4. Step 4: Simplify right side
    28,593.65x = 618,429,253.73
  5. Step 5: Solve for x
    x = 618,429,253.73/28,593.65
  6. Step 6: Final answer
    x = 21,628.20

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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.