Home / 18,370.89-25,351.71-9,987.39

Finding the Fourth Proportional to 18,370.89, 25,351.71 and 9,987.39

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Solution

The fourth proportional to 18,370.89, 25,351.71 and 9,987.39 is: 13,782.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,370.89 : 25,351.71 = 9,987.39 : x
  2. Step 2: Convert to fraction form
    18,370.89/25,351.71 = 9,987.39/x
  3. Step 3: Cross multiply
    18,370.89x = 25,351.71 × 9,987.39
  4. Step 4: Simplify right side
    18,370.89x = 253,197,414.94
  5. Step 5: Solve for x
    x = 253,197,414.94/18,370.89
  6. Step 6: Final answer
    x = 13,782.53

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Double scale
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Similar ratio
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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.