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Finding the Fourth Proportional to 28,079.61, 42,125.49 and 8,359.76

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Solution

The fourth proportional to 28,079.61, 42,125.49 and 8,359.76 is: 12,541.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.61 : 42,125.49 = 8,359.76 : x
  2. Step 2: Convert to fraction form
    28,079.61/42,125.49 = 8,359.76/x
  3. Step 3: Cross multiply
    28,079.61x = 42,125.49 × 8,359.76
  4. Step 4: Simplify right side
    28,079.61x = 352,158,775.65
  5. Step 5: Solve for x
    x = 352,158,775.65/28,079.61
  6. Step 6: Final answer
    x = 12,541.44

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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.