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Finding the Fourth Proportional to 18,666.76, 28,000.51 and 5,519.12

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Solution

The fourth proportional to 18,666.76, 28,000.51 and 5,519.12 is: 8,278.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.76 : 28,000.51 = 5,519.12 : x
  2. Step 2: Convert to fraction form
    18,666.76/28,000.51 = 5,519.12/x
  3. Step 3: Cross multiply
    18,666.76x = 28,000.51 × 5,519.12
  4. Step 4: Simplify right side
    18,666.76x = 154,538,174.75
  5. Step 5: Solve for x
    x = 154,538,174.75/18,666.76
  6. Step 6: Final answer
    x = 8,278.79

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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.