Home / 20,351.52-28,084.32-11,398.23

Finding the Fourth Proportional to 20,351.52, 28,084.32 and 11,398.23

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Solution

The fourth proportional to 20,351.52, 28,084.32 and 11,398.23 is: 15,729.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.52 : 28,084.32 = 11,398.23 : x
  2. Step 2: Convert to fraction form
    20,351.52/28,084.32 = 11,398.23/x
  3. Step 3: Cross multiply
    20,351.52x = 28,084.32 × 11,398.23
  4. Step 4: Simplify right side
    20,351.52x = 320,111,538.75
  5. Step 5: Solve for x
    x = 320,111,538.75/20,351.52
  6. Step 6: Final answer
    x = 15,729.12

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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.