Home / 5,115.36-7,058.94-2,877.60

Finding the Fourth Proportional to 5,115.36, 7,058.94 and 2,877.60

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Solution

The fourth proportional to 5,115.36, 7,058.94 and 2,877.60 is: 3,970.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.36 : 7,058.94 = 2,877.60 : x
  2. Step 2: Convert to fraction form
    5,115.36/7,058.94 = 2,877.60/x
  3. Step 3: Cross multiply
    5,115.36x = 7,058.94 × 2,877.60
  4. Step 4: Simplify right side
    5,115.36x = 20,312,805.74
  5. Step 5: Solve for x
    x = 20,312,805.74/5,115.36
  6. Step 6: Final answer
    x = 3,970.94

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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.