Home / 20,557.12-28,374.30-11,609.86

Finding the Fourth Proportional to 20,557.12, 28,374.30 and 11,609.86

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Solution

The fourth proportional to 20,557.12, 28,374.30 and 11,609.86 is: 16,024.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.12 : 28,374.30 = 11,609.86 : x
  2. Step 2: Convert to fraction form
    20,557.12/28,374.30 = 11,609.86/x
  3. Step 3: Cross multiply
    20,557.12x = 28,374.30 × 11,609.86
  4. Step 4: Simplify right side
    20,557.12x = 329,421,650.60
  5. Step 5: Solve for x
    x = 329,421,650.60/20,557.12
  6. Step 6: Final answer
    x = 16,024.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.