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Finding the Fourth Proportional to 28,356.55, 42,541.17 and 8,636.66

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Solution

The fourth proportional to 28,356.55, 42,541.17 and 8,636.66 is: 12,956.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.55 : 42,541.17 = 8,636.66 : x
  2. Step 2: Convert to fraction form
    28,356.55/42,541.17 = 8,636.66/x
  3. Step 3: Cross multiply
    28,356.55x = 42,541.17 × 8,636.66
  4. Step 4: Simplify right side
    28,356.55x = 367,413,535.73
  5. Step 5: Solve for x
    x = 367,413,535.73/28,356.55
  6. Step 6: Final answer
    x = 12,956.92

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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.