Home / 20,881.25-28,816.52-11,449.81

Finding the Fourth Proportional to 20,881.25, 28,816.52 and 11,449.81

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Solution

The fourth proportional to 20,881.25, 28,816.52 and 11,449.81 is: 15,800.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.25 : 28,816.52 = 11,449.81 : x
  2. Step 2: Convert to fraction form
    20,881.25/28,816.52 = 11,449.81/x
  3. Step 3: Cross multiply
    20,881.25x = 28,816.52 × 11,449.81
  4. Step 4: Simplify right side
    20,881.25x = 329,943,678.86
  5. Step 5: Solve for x
    x = 329,943,678.86/20,881.25
  6. Step 6: Final answer
    x = 15,800.95

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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.