Home / 10,140.31-15,221.40-8,514.64

Finding the Fourth Proportional to 10,140.31, 15,221.40 and 8,514.64

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Solution

The fourth proportional to 10,140.31, 15,221.40 and 8,514.64 is: 12,781.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,140.31 : 15,221.40 = 8,514.64 : x
  2. Step 2: Convert to fraction form
    10,140.31/15,221.40 = 8,514.64/x
  3. Step 3: Cross multiply
    10,140.31x = 15,221.40 × 8,514.64
  4. Step 4: Simplify right side
    10,140.31x = 129,604,741.30
  5. Step 5: Solve for x
    x = 129,604,741.30/10,140.31
  6. Step 6: Final answer
    x = 12,781.14

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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.