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Finding the Fourth Proportional to 18,373.20, 27,559.80 and 15,311.40

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Solution

The fourth proportional to 18,373.20, 27,559.80 and 15,311.40 is: 22,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,373.20 : 27,559.80 = 15,311.40 : x
  2. Step 2: Convert to fraction form
    18,373.20/27,559.80 = 15,311.40/x
  3. Step 3: Cross multiply
    18,373.20x = 27,559.80 × 15,311.40
  4. Step 4: Simplify right side
    18,373.20x = 421,979,121.72
  5. Step 5: Solve for x
    x = 421,979,121.72/18,373.20
  6. Step 6: Final answer
    x = 22,967.10

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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.