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Finding the Fourth Proportional to 18,770.16, 28,135.56 and 7,672.56

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Solution

The fourth proportional to 18,770.16, 28,135.56 and 7,672.56 is: 11,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.16 : 28,135.56 = 7,672.56 : x
  2. Step 2: Convert to fraction form
    18,770.16/28,135.56 = 7,672.56/x
  3. Step 3: Cross multiply
    18,770.16x = 28,135.56 × 7,672.56
  4. Step 4: Simplify right side
    18,770.16x = 215,871,772.23
  5. Step 5: Solve for x
    x = 215,871,772.23/18,770.16
  6. Step 6: Final answer
    x = 11,500.80

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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.