Home / 13,278.76-18,326.82-7,691.56

Finding the Fourth Proportional to 13,278.76, 18,326.82 and 7,691.56

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Solution

The fourth proportional to 13,278.76, 18,326.82 and 7,691.56 is: 10,615.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.76 : 18,326.82 = 7,691.56 : x
  2. Step 2: Convert to fraction form
    13,278.76/18,326.82 = 7,691.56/x
  3. Step 3: Cross multiply
    13,278.76x = 18,326.82 × 7,691.56
  4. Step 4: Simplify right side
    13,278.76x = 140,961,835.64
  5. Step 5: Solve for x
    x = 140,961,835.64/13,278.76
  6. Step 6: Final answer
    x = 10,615.59

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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.