Home / 20,856.14-28,781.87-11,424.11

Finding the Fourth Proportional to 20,856.14, 28,781.87 and 11,424.11

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Solution

The fourth proportional to 20,856.14, 28,781.87 and 11,424.11 is: 15,765.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.14 : 28,781.87 = 11,424.11 : x
  2. Step 2: Convert to fraction form
    20,856.14/28,781.87 = 11,424.11/x
  3. Step 3: Cross multiply
    20,856.14x = 28,781.87 × 11,424.11
  4. Step 4: Simplify right side
    20,856.14x = 328,807,191.77
  5. Step 5: Solve for x
    x = 328,807,191.77/20,856.14
  6. Step 6: Final answer
    x = 15,765.49

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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.