Home / 18,972.11-28,459.98-7,878.56

Finding the Fourth Proportional to 18,972.11, 28,459.98 and 7,878.56

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Solution

The fourth proportional to 18,972.11, 28,459.98 and 7,878.56 is: 11,818.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972.11 : 28,459.98 = 7,878.56 : x
  2. Step 2: Convert to fraction form
    18,972.11/28,459.98 = 7,878.56/x
  3. Step 3: Cross multiply
    18,972.11x = 28,459.98 × 7,878.56
  4. Step 4: Simplify right side
    18,972.11x = 224,223,517.73
  5. Step 5: Solve for x
    x = 224,223,517.73/18,972.11
  6. Step 6: Final answer
    x = 11,818.59

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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.