Home / 42,638.15-63,938.65-12,236.59

Finding the Fourth Proportional to 42,638.15, 63,938.65 and 12,236.59

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Solution

The fourth proportional to 42,638.15, 63,938.65 and 12,236.59 is: 18,349.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,638.15 : 63,938.65 = 12,236.59 : x
  2. Step 2: Convert to fraction form
    42,638.15/63,938.65 = 12,236.59/x
  3. Step 3: Cross multiply
    42,638.15x = 63,938.65 × 12,236.59
  4. Step 4: Simplify right side
    42,638.15x = 782,391,045.20
  5. Step 5: Solve for x
    x = 782,391,045.20/42,638.15
  6. Step 6: Final answer
    x = 18,349.55

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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.