Home / 21,472.36-32,211.45-7,428.61

Finding the Fourth Proportional to 21,472.36, 32,211.45 and 7,428.61

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Solution

The fourth proportional to 21,472.36, 32,211.45 and 7,428.61 is: 11,143.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.36 : 32,211.45 = 7,428.61 : x
  2. Step 2: Convert to fraction form
    21,472.36/32,211.45 = 7,428.61/x
  3. Step 3: Cross multiply
    21,472.36x = 32,211.45 × 7,428.61
  4. Step 4: Simplify right side
    21,472.36x = 239,286,299.58
  5. Step 5: Solve for x
    x = 239,286,299.58/21,472.36
  6. Step 6: Final answer
    x = 11,143.92

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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.