Home / 21,472.30-32,211.38-7,428.56

Finding the Fourth Proportional to 21,472.30, 32,211.38 and 7,428.56

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Solution

The fourth proportional to 21,472.30, 32,211.38 and 7,428.56 is: 11,143.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.30 : 32,211.38 = 7,428.56 : x
  2. Step 2: Convert to fraction form
    21,472.30/32,211.38 = 7,428.56/x
  3. Step 3: Cross multiply
    21,472.30x = 32,211.38 × 7,428.56
  4. Step 4: Simplify right side
    21,472.30x = 239,284,169.01
  5. Step 5: Solve for x
    x = 239,284,169.01/21,472.30
  6. Step 6: Final answer
    x = 11,143.85

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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.