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Finding the Fourth Proportional to 18,770.52, 28,157.15 and 7,677.42

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Solution

The fourth proportional to 18,770.52, 28,157.15 and 7,677.42 is: 11,516.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.52 : 28,157.15 = 7,677.42 : x
  2. Step 2: Convert to fraction form
    18,770.52/28,157.15 = 7,677.42/x
  3. Step 3: Cross multiply
    18,770.52x = 28,157.15 × 7,677.42
  4. Step 4: Simplify right side
    18,770.52x = 216,174,228.17
  5. Step 5: Solve for x
    x = 216,174,228.17/18,770.52
  6. Step 6: Final answer
    x = 11,516.69

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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.