Home / 20,405.39-28,159.38-11,453.04

Finding the Fourth Proportional to 20,405.39, 28,159.38 and 11,453.04

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Solution

The fourth proportional to 20,405.39, 28,159.38 and 11,453.04 is: 15,805.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.39 : 28,159.38 = 11,453.04 : x
  2. Step 2: Convert to fraction form
    20,405.39/28,159.38 = 11,453.04/x
  3. Step 3: Cross multiply
    20,405.39x = 28,159.38 × 11,453.04
  4. Step 4: Simplify right side
    20,405.39x = 322,510,505.52
  5. Step 5: Solve for x
    x = 322,510,505.52/20,405.39
  6. Step 6: Final answer
    x = 15,805.17

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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.