Home / 21,218.14-31,834.12-10,123.39

Finding the Fourth Proportional to 21,218.14, 31,834.12 and 10,123.39

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Solution

The fourth proportional to 21,218.14, 31,834.12 and 10,123.39 is: 15,188.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.14 : 31,834.12 = 10,123.39 : x
  2. Step 2: Convert to fraction form
    21,218.14/31,834.12 = 10,123.39/x
  3. Step 3: Cross multiply
    21,218.14x = 31,834.12 × 10,123.39
  4. Step 4: Simplify right side
    21,218.14x = 322,269,213.90
  5. Step 5: Solve for x
    x = 322,269,213.90/21,218.14
  6. Step 6: Final answer
    x = 15,188.38

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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.