Home / 5,081.76-7,012.85-2,985.75

Finding the Fourth Proportional to 5,081.76, 7,012.85 and 2,985.75

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Solution

The fourth proportional to 5,081.76, 7,012.85 and 2,985.75 is: 4,120.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,081.76 : 7,012.85 = 2,985.75 : x
  2. Step 2: Convert to fraction form
    5,081.76/7,012.85 = 2,985.75/x
  3. Step 3: Cross multiply
    5,081.76x = 7,012.85 × 2,985.75
  4. Step 4: Simplify right side
    5,081.76x = 20,938,601.96
  5. Step 5: Solve for x
    x = 20,938,601.96/5,081.76
  6. Step 6: Final answer
    x = 4,120.34

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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.