Home / 21,251.11-31,877.35-8,772.15

Finding the Fourth Proportional to 21,251.11, 31,877.35 and 8,772.15

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Solution

The fourth proportional to 21,251.11, 31,877.35 and 8,772.15 is: 13,158.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.11 : 31,877.35 = 8,772.15 : x
  2. Step 2: Convert to fraction form
    21,251.11/31,877.35 = 8,772.15/x
  3. Step 3: Cross multiply
    21,251.11x = 31,877.35 × 8,772.15
  4. Step 4: Simplify right side
    21,251.11x = 279,632,814.10
  5. Step 5: Solve for x
    x = 279,632,814.10/21,251.11
  6. Step 6: Final answer
    x = 13,158.50

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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.