Home / 7,229.60-9,976.80-4,085.78

Finding the Fourth Proportional to 7,229.60, 9,976.80 and 4,085.78

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Solution

The fourth proportional to 7,229.60, 9,976.80 and 4,085.78 is: 5,638.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,229.60 : 9,976.80 = 4,085.78 : x
  2. Step 2: Convert to fraction form
    7,229.60/9,976.80 = 4,085.78/x
  3. Step 3: Cross multiply
    7,229.60x = 9,976.80 × 4,085.78
  4. Step 4: Simplify right side
    7,229.60x = 40,763,009.90
  5. Step 5: Solve for x
    x = 40,763,009.90/7,229.60
  6. Step 6: Final answer
    x = 5,638.35

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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.