Home / 11,113.60-15,338.82-7,139.68

Finding the Fourth Proportional to 11,113.60, 15,338.82 and 7,139.68

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Solution

The fourth proportional to 11,113.60, 15,338.82 and 7,139.68 is: 9,854.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,113.60 : 15,338.82 = 7,139.68 : x
  2. Step 2: Convert to fraction form
    11,113.60/15,338.82 = 7,139.68/x
  3. Step 3: Cross multiply
    11,113.60x = 15,338.82 × 7,139.68
  4. Step 4: Simplify right side
    11,113.60x = 109,514,266.38
  5. Step 5: Solve for x
    x = 109,514,266.38/11,113.60
  6. Step 6: Final answer
    x = 9,854.08

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Half scale
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Double scale
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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.