Home / 11,142.83-15,387.50-7,170.86

Finding the Fourth Proportional to 11,142.83, 15,387.50 and 7,170.86

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Solution

The fourth proportional to 11,142.83, 15,387.50 and 7,170.86 is: 9,902.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,142.83 : 15,387.50 = 7,170.86 : x
  2. Step 2: Convert to fraction form
    11,142.83/15,387.50 = 7,170.86/x
  3. Step 3: Cross multiply
    11,142.83x = 15,387.50 × 7,170.86
  4. Step 4: Simplify right side
    11,142.83x = 110,341,549.24
  5. Step 5: Solve for x
    x = 110,341,549.24/11,142.83
  6. Step 6: Final answer
    x = 9,902.48

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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.