Home / 7,128.16-10,691.40-2,197.36

Finding the Fourth Proportional to 7,128.16, 10,691.40 and 2,197.36

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Solution

The fourth proportional to 7,128.16, 10,691.40 and 2,197.36 is: 3,295.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.16 : 10,691.40 = 2,197.36 : x
  2. Step 2: Convert to fraction form
    7,128.16/10,691.40 = 2,197.36/x
  3. Step 3: Cross multiply
    7,128.16x = 10,691.40 × 2,197.36
  4. Step 4: Simplify right side
    7,128.16x = 23,492,854.70
  5. Step 5: Solve for x
    x = 23,492,854.70/7,128.16
  6. Step 6: Final answer
    x = 3,295.78

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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.