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Finding the Fourth Proportional to 18,872.16, 28,298.52 and 8,475

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Solution

The fourth proportional to 18,872.16, 28,298.52 and 8,475 is: 12,708.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.16 : 28,298.52 = 8,475 : x
  2. Step 2: Convert to fraction form
    18,872.16/28,298.52 = 8,475/x
  3. Step 3: Cross multiply
    18,872.16x = 28,298.52 × 8,475
  4. Step 4: Simplify right side
    18,872.16x = 239,829,957
  5. Step 5: Solve for x
    x = 239,829,957/18,872.16
  6. Step 6: Final answer
    x = 12,708.13

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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.