Home / 18,373.39-25,355.10-9,989.89

Finding the Fourth Proportional to 18,373.39, 25,355.10 and 9,989.89

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Solution

The fourth proportional to 18,373.39, 25,355.10 and 9,989.89 is: 13,785.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,373.39 : 25,355.10 = 9,989.89 : x
  2. Step 2: Convert to fraction form
    18,373.39/25,355.10 = 9,989.89/x
  3. Step 3: Cross multiply
    18,373.39x = 25,355.10 × 9,989.89
  4. Step 4: Simplify right side
    18,373.39x = 253,294,659.94
  5. Step 5: Solve for x
    x = 253,294,659.94/18,373.39
  6. Step 6: Final answer
    x = 13,785.95

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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.