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Finding the Fourth Proportional to 18,162.92, 25,065.90 and 13,678.76

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Solution

The fourth proportional to 18,162.92, 25,065.90 and 13,678.76 is: 18,877.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,162.92 : 25,065.90 = 13,678.76 : x
  2. Step 2: Convert to fraction form
    18,162.92/25,065.90 = 13,678.76/x
  3. Step 3: Cross multiply
    18,162.92x = 25,065.90 × 13,678.76
  4. Step 4: Simplify right side
    18,162.92x = 342,870,430.28
  5. Step 5: Solve for x
    x = 342,870,430.28/18,162.92
  6. Step 6: Final answer
    x = 18,877.49

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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.