Home / 42,120.30-63,180.45-12,548.43

Finding the Fourth Proportional to 42,120.30, 63,180.45 and 12,548.43

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Solution

The fourth proportional to 42,120.30, 63,180.45 and 12,548.43 is: 18,822.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,120.30 : 63,180.45 = 12,548.43 : x
  2. Step 2: Convert to fraction form
    42,120.30/63,180.45 = 12,548.43/x
  3. Step 3: Cross multiply
    42,120.30x = 63,180.45 × 12,548.43
  4. Step 4: Simplify right side
    42,120.30x = 792,815,454.19
  5. Step 5: Solve for x
    x = 792,815,454.19/42,120.30
  6. Step 6: Final answer
    x = 18,822.65

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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.