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Finding the Fourth Proportional to 28,565.49, 42,854.49 and 8,574.15

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Solution

The fourth proportional to 28,565.49, 42,854.49 and 8,574.15 is: 12,863.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,565.49 : 42,854.49 = 8,574.15 : x
  2. Step 2: Convert to fraction form
    28,565.49/42,854.49 = 8,574.15/x
  3. Step 3: Cross multiply
    28,565.49x = 42,854.49 × 8,574.15
  4. Step 4: Simplify right side
    28,565.49x = 367,440,825.43
  5. Step 5: Solve for x
    x = 367,440,825.43/28,565.49
  6. Step 6: Final answer
    x = 12,863.10

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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.