Home / 18,825.66-28,348.56-13,929.78

Finding the Fourth Proportional to 18,825.66, 28,348.56 and 13,929.78

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Solution

The fourth proportional to 18,825.66, 28,348.56 and 13,929.78 is: 20,976.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,825.66 : 28,348.56 = 13,929.78 : x
  2. Step 2: Convert to fraction form
    18,825.66/28,348.56 = 13,929.78/x
  3. Step 3: Cross multiply
    18,825.66x = 28,348.56 × 13,929.78
  4. Step 4: Simplify right side
    18,825.66x = 394,889,204.12
  5. Step 5: Solve for x
    x = 394,889,204.12/18,825.66
  6. Step 6: Final answer
    x = 20,976.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.