Home / 9,117.88-12,581.28-5,138.92

Finding the Fourth Proportional to 9,117.88, 12,581.28 and 5,138.92

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Solution

The fourth proportional to 9,117.88, 12,581.28 and 5,138.92 is: 7,090.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117.88 : 12,581.28 = 5,138.92 : x
  2. Step 2: Convert to fraction form
    9,117.88/12,581.28 = 5,138.92/x
  3. Step 3: Cross multiply
    9,117.88x = 12,581.28 × 5,138.92
  4. Step 4: Simplify right side
    9,117.88x = 64,654,191.42
  5. Step 5: Solve for x
    x = 64,654,191.42/9,117.88
  6. Step 6: Final answer
    x = 7,090.92

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Half scale
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Double scale
Find fourth proportional to 9,118.88, 12,582.66 and 5,139.92
Similar ratio
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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.