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Finding the Fourth Proportional to 28,655.65, 42,921.15 and 17,528.68

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Solution

The fourth proportional to 28,655.65, 42,921.15 and 17,528.68 is: 26,254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,655.65 : 42,921.15 = 17,528.68 : x
  2. Step 2: Convert to fraction form
    28,655.65/42,921.15 = 17,528.68/x
  3. Step 3: Cross multiply
    28,655.65x = 42,921.15 × 17,528.68
  4. Step 4: Simplify right side
    28,655.65x = 752,351,103.58
  5. Step 5: Solve for x
    x = 752,351,103.58/28,655.65
  6. Step 6: Final answer
    x = 26,254.90

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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.