Home / 5,161.12-7,122.12-2,803.20

Finding the Fourth Proportional to 5,161.12, 7,122.12 and 2,803.20

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Solution

The fourth proportional to 5,161.12, 7,122.12 and 2,803.20 is: 3,868.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.12 : 7,122.12 = 2,803.20 : x
  2. Step 2: Convert to fraction form
    5,161.12/7,122.12 = 2,803.20/x
  3. Step 3: Cross multiply
    5,161.12x = 7,122.12 × 2,803.20
  4. Step 4: Simplify right side
    5,161.12x = 19,964,726.78
  5. Step 5: Solve for x
    x = 19,964,726.78/5,161.12
  6. Step 6: Final answer
    x = 3,868.29

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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.