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Finding the Fourth Proportional to 42,253.80, 63,372.60 and 12,672.60

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Solution

The fourth proportional to 42,253.80, 63,372.60 and 12,672.60 is: 19,006.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,253.80 : 63,372.60 = 12,672.60 : x
  2. Step 2: Convert to fraction form
    42,253.80/63,372.60 = 12,672.60/x
  3. Step 3: Cross multiply
    42,253.80x = 63,372.60 × 12,672.60
  4. Step 4: Simplify right side
    42,253.80x = 803,095,610.76
  5. Step 5: Solve for x
    x = 803,095,610.76/42,253.80
  6. Step 6: Final answer
    x = 19,006.47

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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.