Home / 20,743.78-31,112.25-8,899.47

Finding the Fourth Proportional to 20,743.78, 31,112.25 and 8,899.47

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Solution

The fourth proportional to 20,743.78, 31,112.25 and 8,899.47 is: 13,347.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.78 : 31,112.25 = 8,899.47 : x
  2. Step 2: Convert to fraction form
    20,743.78/31,112.25 = 8,899.47/x
  3. Step 3: Cross multiply
    20,743.78x = 31,112.25 × 8,899.47
  4. Step 4: Simplify right side
    20,743.78x = 276,882,379.95
  5. Step 5: Solve for x
    x = 276,882,379.95/20,743.78
  6. Step 6: Final answer
    x = 13,347.73

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1.5x scale

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.