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Finding the Fourth Proportional to 28,641.55, 42,753.05 and 26,531.11

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Solution

The fourth proportional to 28,641.55, 42,753.05 and 26,531.11 is: 39,602.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,641.55 : 42,753.05 = 26,531.11 : x
  2. Step 2: Convert to fraction form
    28,641.55/42,753.05 = 26,531.11/x
  3. Step 3: Cross multiply
    28,641.55x = 42,753.05 × 26,531.11
  4. Step 4: Simplify right side
    28,641.55x = 1,134,285,872.39
  5. Step 5: Solve for x
    x = 1,134,285,872.39/28,641.55
  6. Step 6: Final answer
    x = 39,602.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.