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Finding the Fourth Proportional to 19,916.20, 29,874.30 and 15,250.60

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Solution

The fourth proportional to 19,916.20, 29,874.30 and 15,250.60 is: 22,875.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,916.20 : 29,874.30 = 15,250.60 : x
  2. Step 2: Convert to fraction form
    19,916.20/29,874.30 = 15,250.60/x
  3. Step 3: Cross multiply
    19,916.20x = 29,874.30 × 15,250.60
  4. Step 4: Simplify right side
    19,916.20x = 455,600,999.58
  5. Step 5: Solve for x
    x = 455,600,999.58/19,916.20
  6. Step 6: Final answer
    x = 22,875.90

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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.