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Finding the Fourth Proportional to 18,409.80, 27,614.70 and 15,904.20

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Solution

The fourth proportional to 18,409.80, 27,614.70 and 15,904.20 is: 23,856.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409.80 : 27,614.70 = 15,904.20 : x
  2. Step 2: Convert to fraction form
    18,409.80/27,614.70 = 15,904.20/x
  3. Step 3: Cross multiply
    18,409.80x = 27,614.70 × 15,904.20
  4. Step 4: Simplify right side
    18,409.80x = 439,189,711.74
  5. Step 5: Solve for x
    x = 439,189,711.74/18,409.80
  6. Step 6: Final answer
    x = 23,856.30

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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.