Home / 21,143.72-31,713.05-5,562.56

Finding the Fourth Proportional to 21,143.72, 31,713.05 and 5,562.56

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Solution

The fourth proportional to 21,143.72, 31,713.05 and 5,562.56 is: 8,343.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.72 : 31,713.05 = 5,562.56 : x
  2. Step 2: Convert to fraction form
    21,143.72/31,713.05 = 5,562.56/x
  3. Step 3: Cross multiply
    21,143.72x = 31,713.05 × 5,562.56
  4. Step 4: Simplify right side
    21,143.72x = 176,405,743.41
  5. Step 5: Solve for x
    x = 176,405,743.41/21,143.72
  6. Step 6: Final answer
    x = 8,343.17

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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.