Home / 21,182.66-31,784.25-8,711.90

Finding the Fourth Proportional to 21,182.66, 31,784.25 and 8,711.90

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Solution

The fourth proportional to 21,182.66, 31,784.25 and 8,711.90 is: 13,072.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,182.66 : 31,784.25 = 8,711.90 : x
  2. Step 2: Convert to fraction form
    21,182.66/31,784.25 = 8,711.90/x
  3. Step 3: Cross multiply
    21,182.66x = 31,784.25 × 8,711.90
  4. Step 4: Simplify right side
    21,182.66x = 276,901,207.58
  5. Step 5: Solve for x
    x = 276,901,207.58/21,182.66
  6. Step 6: Final answer
    x = 13,072.07

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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.