Home / 5,128.73-7,077.45-2,891.06

Finding the Fourth Proportional to 5,128.73, 7,077.45 and 2,891.06

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Solution

The fourth proportional to 5,128.73, 7,077.45 and 2,891.06 is: 3,989.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.73 : 7,077.45 = 2,891.06 : x
  2. Step 2: Convert to fraction form
    5,128.73/7,077.45 = 2,891.06/x
  3. Step 3: Cross multiply
    5,128.73x = 7,077.45 × 2,891.06
  4. Step 4: Simplify right side
    5,128.73x = 20,461,350.29
  5. Step 5: Solve for x
    x = 20,461,350.29/5,128.73
  6. Step 6: Final answer
    x = 3,989.55

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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.