Home / 21,247.10-31,871.19-11,881.88

Finding the Fourth Proportional to 21,247.10, 31,871.19 and 11,881.88

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Solution

The fourth proportional to 21,247.10, 31,871.19 and 11,881.88 is: 17,823.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.10 : 31,871.19 = 11,881.88 : x
  2. Step 2: Convert to fraction form
    21,247.10/31,871.19 = 11,881.88/x
  3. Step 3: Cross multiply
    21,247.10x = 31,871.19 × 11,881.88
  4. Step 4: Simplify right side
    21,247.10x = 378,689,655.04
  5. Step 5: Solve for x
    x = 378,689,655.04/21,247.10
  6. Step 6: Final answer
    x = 17,823.12

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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.