Home / 21,242.95-31,864.42-10,115.90

Finding the Fourth Proportional to 21,242.95, 31,864.42 and 10,115.90

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Solution

The fourth proportional to 21,242.95, 31,864.42 and 10,115.90 is: 15,173.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.95 : 31,864.42 = 10,115.90 : x
  2. Step 2: Convert to fraction form
    21,242.95/31,864.42 = 10,115.90/x
  3. Step 3: Cross multiply
    21,242.95x = 31,864.42 × 10,115.90
  4. Step 4: Simplify right side
    21,242.95x = 322,337,259.09
  5. Step 5: Solve for x
    x = 322,337,259.09/21,242.95
  6. Step 6: Final answer
    x = 15,173.85

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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.