Home / 13,119.40-18,104.61-7,150.92

Finding the Fourth Proportional to 13,119.40, 18,104.61 and 7,150.92

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Solution

The fourth proportional to 13,119.40, 18,104.61 and 7,150.92 is: 9,868.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.40 : 18,104.61 = 7,150.92 : x
  2. Step 2: Convert to fraction form
    13,119.40/18,104.61 = 7,150.92/x
  3. Step 3: Cross multiply
    13,119.40x = 18,104.61 × 7,150.92
  4. Step 4: Simplify right side
    13,119.40x = 129,464,617.74
  5. Step 5: Solve for x
    x = 129,464,617.74/13,119.40
  6. Step 6: Final answer
    x = 9,868.18

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Half scale
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Double scale
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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.