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Finding the Fourth Proportional to 18,478.05, 27,726.36 and 8,618.10

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Solution

The fourth proportional to 18,478.05, 27,726.36 and 8,618.10 is: 12,931.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.05 : 27,726.36 = 8,618.10 : x
  2. Step 2: Convert to fraction form
    18,478.05/27,726.36 = 8,618.10/x
  3. Step 3: Cross multiply
    18,478.05x = 27,726.36 × 8,618.10
  4. Step 4: Simplify right side
    18,478.05x = 238,948,543.12
  5. Step 5: Solve for x
    x = 238,948,543.12/18,478.05
  6. Step 6: Final answer
    x = 12,931.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.