Home / 5,115.40-7,057.24-2,876.76

Finding the Fourth Proportional to 5,115.40, 7,057.24 and 2,876.76

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Solution

The fourth proportional to 5,115.40, 7,057.24 and 2,876.76 is: 3,968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.40 : 7,057.24 = 2,876.76 : x
  2. Step 2: Convert to fraction form
    5,115.40/7,057.24 = 2,876.76/x
  3. Step 3: Cross multiply
    5,115.40x = 7,057.24 × 2,876.76
  4. Step 4: Simplify right side
    5,115.40x = 20,301,985.74
  5. Step 5: Solve for x
    x = 20,301,985.74/5,115.40
  6. Step 6: Final answer
    x = 3,968.80

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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.