Home / 28,598.28-42,898.20-7,821.78

Finding the Fourth Proportional to 28,598.28, 42,898.20 and 7,821.78

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Solution

The fourth proportional to 28,598.28, 42,898.20 and 7,821.78 is: 11,732.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,598.28 : 42,898.20 = 7,821.78 : x
  2. Step 2: Convert to fraction form
    28,598.28/42,898.20 = 7,821.78/x
  3. Step 3: Cross multiply
    28,598.28x = 42,898.20 × 7,821.78
  4. Step 4: Simplify right side
    28,598.28x = 335,540,282.80
  5. Step 5: Solve for x
    x = 335,540,282.80/28,598.28
  6. Step 6: Final answer
    x = 11,732.88

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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.