Home / 11,119.60-15,347.10-7,145.68

Finding the Fourth Proportional to 11,119.60, 15,347.10 and 7,145.68

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Solution

The fourth proportional to 11,119.60, 15,347.10 and 7,145.68 is: 9,862.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,119.60 : 15,347.10 = 7,145.68 : x
  2. Step 2: Convert to fraction form
    11,119.60/15,347.10 = 7,145.68/x
  3. Step 3: Cross multiply
    11,119.60x = 15,347.10 × 7,145.68
  4. Step 4: Simplify right side
    11,119.60x = 109,665,465.53
  5. Step 5: Solve for x
    x = 109,665,465.53/11,119.60
  6. Step 6: Final answer
    x = 9,862.36

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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.