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Finding the Fourth Proportional to 18,381.40, 27,499.20 and 15,943.30

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Solution

The fourth proportional to 18,381.40, 27,499.20 and 15,943.30 is: 23,851.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.40 : 27,499.20 = 15,943.30 : x
  2. Step 2: Convert to fraction form
    18,381.40/27,499.20 = 15,943.30/x
  3. Step 3: Cross multiply
    18,381.40x = 27,499.20 × 15,943.30
  4. Step 4: Simplify right side
    18,381.40x = 438,427,995.36
  5. Step 5: Solve for x
    x = 438,427,995.36/18,381.40
  6. Step 6: Final answer
    x = 23,851.72

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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.