Home / 15,134.20-20,887.90-9,170.96

Finding the Fourth Proportional to 15,134.20, 20,887.90 and 9,170.96

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Solution

The fourth proportional to 15,134.20, 20,887.90 and 9,170.96 is: 12,657.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134.20 : 20,887.90 = 9,170.96 : x
  2. Step 2: Convert to fraction form
    15,134.20/20,887.90 = 9,170.96/x
  3. Step 3: Cross multiply
    15,134.20x = 20,887.90 × 9,170.96
  4. Step 4: Simplify right side
    15,134.20x = 191,562,095.38
  5. Step 5: Solve for x
    x = 191,562,095.38/15,134.20
  6. Step 6: Final answer
    x = 12,657.56

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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.