Home / 21,139.76-31,685.88-10,037.36

Finding the Fourth Proportional to 21,139.76, 31,685.88 and 10,037.36

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Solution

The fourth proportional to 21,139.76, 31,685.88 and 10,037.36 is: 15,044.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.76 : 31,685.88 = 10,037.36 : x
  2. Step 2: Convert to fraction form
    21,139.76/31,685.88 = 10,037.36/x
  3. Step 3: Cross multiply
    21,139.76x = 31,685.88 × 10,037.36
  4. Step 4: Simplify right side
    21,139.76x = 318,042,584.48
  5. Step 5: Solve for x
    x = 318,042,584.48/21,139.76
  6. Step 6: Final answer
    x = 15,044.76

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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.