Home / 20,839.76-28,761.18-11,889.47

Finding the Fourth Proportional to 20,839.76, 28,761.18 and 11,889.47

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Solution

The fourth proportional to 20,839.76, 28,761.18 and 11,889.47 is: 16,408.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.76 : 28,761.18 = 11,889.47 : x
  2. Step 2: Convert to fraction form
    20,839.76/28,761.18 = 11,889.47/x
  3. Step 3: Cross multiply
    20,839.76x = 28,761.18 × 11,889.47
  4. Step 4: Simplify right side
    20,839.76x = 341,955,186.77
  5. Step 5: Solve for x
    x = 341,955,186.77/20,839.76
  6. Step 6: Final answer
    x = 16,408.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.