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Finding the Fourth Proportional to 18,863.72, 28,307.87 and 7,177.04

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Solution

The fourth proportional to 18,863.72, 28,307.87 and 7,177.04 is: 10,770.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.72 : 28,307.87 = 7,177.04 : x
  2. Step 2: Convert to fraction form
    18,863.72/28,307.87 = 7,177.04/x
  3. Step 3: Cross multiply
    18,863.72x = 28,307.87 × 7,177.04
  4. Step 4: Simplify right side
    18,863.72x = 203,166,679.42
  5. Step 5: Solve for x
    x = 203,166,679.42/18,863.72
  6. Step 6: Final answer
    x = 10,770.23

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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.