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Finding the Fourth Proportional to 13,885.92, 20,779.20 and 12,058.56

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Solution

The fourth proportional to 13,885.92, 20,779.20 and 12,058.56 is: 18,044.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,885.92 : 20,779.20 = 12,058.56 : x
  2. Step 2: Convert to fraction form
    13,885.92/20,779.20 = 12,058.56/x
  3. Step 3: Cross multiply
    13,885.92x = 20,779.20 × 12,058.56
  4. Step 4: Simplify right side
    13,885.92x = 250,567,229.95
  5. Step 5: Solve for x
    x = 250,567,229.95/13,885.92
  6. Step 6: Final answer
    x = 18,044.70

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1.5x scale

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.