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Finding the Fourth Proportional to 10,955.78, 15,118.17 and 6,239.90

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Solution

The fourth proportional to 10,955.78, 15,118.17 and 6,239.90 is: 8,610.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.78 : 15,118.17 = 6,239.90 : x
  2. Step 2: Convert to fraction form
    10,955.78/15,118.17 = 6,239.90/x
  3. Step 3: Cross multiply
    10,955.78x = 15,118.17 × 6,239.90
  4. Step 4: Simplify right side
    10,955.78x = 94,335,868.98
  5. Step 5: Solve for x
    x = 94,335,868.98/10,955.78
  6. Step 6: Final answer
    x = 8,610.60

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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.