Home / 21,247.34-31,871.69-6,456.39

Finding the Fourth Proportional to 21,247.34, 31,871.69 and 6,456.39

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Solution

The fourth proportional to 21,247.34, 31,871.69 and 6,456.39 is: 9,684.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.34 : 31,871.69 = 6,456.39 : x
  2. Step 2: Convert to fraction form
    21,247.34/31,871.69 = 6,456.39/x
  3. Step 3: Cross multiply
    21,247.34x = 31,871.69 × 6,456.39
  4. Step 4: Simplify right side
    21,247.34x = 205,776,060.60
  5. Step 5: Solve for x
    x = 205,776,060.60/21,247.34
  6. Step 6: Final answer
    x = 9,684.79

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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.