Home / 5,127.92-7,076.40-2,889.76

Finding the Fourth Proportional to 5,127.92, 7,076.40 and 2,889.76

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Solution

The fourth proportional to 5,127.92, 7,076.40 and 2,889.76 is: 3,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,127.92 : 7,076.40 = 2,889.76 : x
  2. Step 2: Convert to fraction form
    5,127.92/7,076.40 = 2,889.76/x
  3. Step 3: Cross multiply
    5,127.92x = 7,076.40 × 2,889.76
  4. Step 4: Simplify right side
    5,127.92x = 20,449,097.66
  5. Step 5: Solve for x
    x = 20,449,097.66/5,127.92
  6. Step 6: Final answer
    x = 3,987.80

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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.