Home / 21,242.97-31,868.28-8,756.05

Finding the Fourth Proportional to 21,242.97, 31,868.28 and 8,756.05

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Solution

The fourth proportional to 21,242.97, 31,868.28 and 8,756.05 is: 13,135.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.97 : 31,868.28 = 8,756.05 : x
  2. Step 2: Convert to fraction form
    21,242.97/31,868.28 = 8,756.05/x
  3. Step 3: Cross multiply
    21,242.97x = 31,868.28 × 8,756.05
  4. Step 4: Simplify right side
    21,242.97x = 279,040,253.09
  5. Step 5: Solve for x
    x = 279,040,253.09/21,242.97
  6. Step 6: Final answer
    x = 13,135.65

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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.