Home / 11,108.88-15,309.14-7,959.60

Finding the Fourth Proportional to 11,108.88, 15,309.14 and 7,959.60

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Solution

The fourth proportional to 11,108.88, 15,309.14 and 7,959.60 is: 10,969.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,108.88 : 15,309.14 = 7,959.60 : x
  2. Step 2: Convert to fraction form
    11,108.88/15,309.14 = 7,959.60/x
  3. Step 3: Cross multiply
    11,108.88x = 15,309.14 × 7,959.60
  4. Step 4: Simplify right side
    11,108.88x = 121,854,630.74
  5. Step 5: Solve for x
    x = 121,854,630.74/11,108.88
  6. Step 6: Final answer
    x = 10,969.12

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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.