Home / 5,115.28-7,058.64-2,876.98

Finding the Fourth Proportional to 5,115.28, 7,058.64 and 2,876.98

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Solution

The fourth proportional to 5,115.28, 7,058.64 and 2,876.98 is: 3,969.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.28 : 7,058.64 = 2,876.98 : x
  2. Step 2: Convert to fraction form
    5,115.28/7,058.64 = 2,876.98/x
  3. Step 3: Cross multiply
    5,115.28x = 7,058.64 × 2,876.98
  4. Step 4: Simplify right side
    5,115.28x = 20,307,566.11
  5. Step 5: Solve for x
    x = 20,307,566.11/5,115.28
  6. Step 6: Final answer
    x = 3,969.98

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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.