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Finding the Fourth Proportional to 28,491.40, 42,737.10 and 28,102.60

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Solution

The fourth proportional to 28,491.40, 42,737.10 and 28,102.60 is: 42,153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.40 : 42,737.10 = 28,102.60 : x
  2. Step 2: Convert to fraction form
    28,491.40/42,737.10 = 28,102.60/x
  3. Step 3: Cross multiply
    28,491.40x = 42,737.10 × 28,102.60
  4. Step 4: Simplify right side
    28,491.40x = 1,201,023,626.46
  5. Step 5: Solve for x
    x = 1,201,023,626.46/28,491.40
  6. Step 6: Final answer
    x = 42,153.90

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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.