Home / 7,218.60-9,961.80-4,074.18

Finding the Fourth Proportional to 7,218.60, 9,961.80 and 4,074.18

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Solution

The fourth proportional to 7,218.60, 9,961.80 and 4,074.18 is: 5,622.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.60 : 9,961.80 = 4,074.18 : x
  2. Step 2: Convert to fraction form
    7,218.60/9,961.80 = 4,074.18/x
  3. Step 3: Cross multiply
    7,218.60x = 9,961.80 × 4,074.18
  4. Step 4: Simplify right side
    7,218.60x = 40,586,166.32
  5. Step 5: Solve for x
    x = 40,586,166.32/7,218.60
  6. Step 6: Final answer
    x = 5,622.44

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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.