Home / 21,218.64-31,834.87-10,123.89

Finding the Fourth Proportional to 21,218.64, 31,834.87 and 10,123.89

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Solution

The fourth proportional to 21,218.64, 31,834.87 and 10,123.89 is: 15,189.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.64 : 31,834.87 = 10,123.89 : x
  2. Step 2: Convert to fraction form
    21,218.64/31,834.87 = 10,123.89/x
  3. Step 3: Cross multiply
    21,218.64x = 31,834.87 × 10,123.89
  4. Step 4: Simplify right side
    21,218.64x = 322,292,671.42
  5. Step 5: Solve for x
    x = 322,292,671.42/21,218.64
  6. Step 6: Final answer
    x = 15,189.13

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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.