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Finding the Fourth Proportional to 18,471.87, 27,663.54 and 13,460.81

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Solution

The fourth proportional to 18,471.87, 27,663.54 and 13,460.81 is: 20,158.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.87 : 27,663.54 = 13,460.81 : x
  2. Step 2: Convert to fraction form
    18,471.87/27,663.54 = 13,460.81/x
  3. Step 3: Cross multiply
    18,471.87x = 27,663.54 × 13,460.81
  4. Step 4: Simplify right side
    18,471.87x = 372,373,517.55
  5. Step 5: Solve for x
    x = 372,373,517.55/18,471.87
  6. Step 6: Final answer
    x = 20,158.95

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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.