Home / 21,428.08-32,162.90-10,342.56

Finding the Fourth Proportional to 21,428.08, 32,162.90 and 10,342.56

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Solution

The fourth proportional to 21,428.08, 32,162.90 and 10,342.56 is: 15,523.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.08 : 32,162.90 = 10,342.56 : x
  2. Step 2: Convert to fraction form
    21,428.08/32,162.90 = 10,342.56/x
  3. Step 3: Cross multiply
    21,428.08x = 32,162.90 × 10,342.56
  4. Step 4: Simplify right side
    21,428.08x = 332,646,550.70
  5. Step 5: Solve for x
    x = 332,646,550.70/21,428.08
  6. Step 6: Final answer
    x = 15,523.86

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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.