Home / 13,427.38-18,534.78-11,531.35

Finding the Fourth Proportional to 13,427.38, 18,534.78 and 11,531.35

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Solution

The fourth proportional to 13,427.38, 18,534.78 and 11,531.35 is: 15,917.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.38 : 18,534.78 = 11,531.35 : x
  2. Step 2: Convert to fraction form
    13,427.38/18,534.78 = 11,531.35/x
  3. Step 3: Cross multiply
    13,427.38x = 18,534.78 × 11,531.35
  4. Step 4: Simplify right side
    13,427.38x = 213,730,977.70
  5. Step 5: Solve for x
    x = 213,730,977.70/13,427.38
  6. Step 6: Final answer
    x = 15,917.55

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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.