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Finding the Fourth Proportional to 18,178.92, 25,087.62 and 10,221.12

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Solution

The fourth proportional to 18,178.92, 25,087.62 and 10,221.12 is: 14,105.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,178.92 : 25,087.62 = 10,221.12 : x
  2. Step 2: Convert to fraction form
    18,178.92/25,087.62 = 10,221.12/x
  3. Step 3: Cross multiply
    18,178.92x = 25,087.62 × 10,221.12
  4. Step 4: Simplify right side
    18,178.92x = 256,423,574.53
  5. Step 5: Solve for x
    x = 256,423,574.53/18,178.92
  6. Step 6: Final answer
    x = 14,105.55

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Half scale
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Double scale
Find fourth proportional to 18,179.92, 25,089 and 10,222.12
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.