Home / 11,385.79-17,080.28-3,988.55

Finding the Fourth Proportional to 11,385.79, 17,080.28 and 3,988.55

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Solution

The fourth proportional to 11,385.79, 17,080.28 and 3,988.55 is: 5,983.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.79 : 17,080.28 = 3,988.55 : x
  2. Step 2: Convert to fraction form
    11,385.79/17,080.28 = 3,988.55/x
  3. Step 3: Cross multiply
    11,385.79x = 17,080.28 × 3,988.55
  4. Step 4: Simplify right side
    11,385.79x = 68,125,530.85
  5. Step 5: Solve for x
    x = 68,125,530.85/11,385.79
  6. Step 6: Final answer
    x = 5,983.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.