Home / 5,115.40-7,058.73-2,876.92

Finding the Fourth Proportional to 5,115.40, 7,058.73 and 2,876.92

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Solution

The fourth proportional to 5,115.40, 7,058.73 and 2,876.92 is: 3,969.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.40 : 7,058.73 = 2,876.92 : x
  2. Step 2: Convert to fraction form
    5,115.40/7,058.73 = 2,876.92/x
  3. Step 3: Cross multiply
    5,115.40x = 7,058.73 × 2,876.92
  4. Step 4: Simplify right side
    5,115.40x = 20,307,401.51
  5. Step 5: Solve for x
    x = 20,307,401.51/5,115.40
  6. Step 6: Final answer
    x = 3,969.86

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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.