Home / 7,221.60-9,966.42-4,077.72

Finding the Fourth Proportional to 7,221.60, 9,966.42 and 4,077.72

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Solution

The fourth proportional to 7,221.60, 9,966.42 and 4,077.72 is: 5,627.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.60 : 9,966.42 = 4,077.72 : x
  2. Step 2: Convert to fraction form
    7,221.60/9,966.42 = 4,077.72/x
  3. Step 3: Cross multiply
    7,221.60x = 9,966.42 × 4,077.72
  4. Step 4: Simplify right side
    7,221.60x = 40,640,270.16
  5. Step 5: Solve for x
    x = 40,640,270.16/7,221.60
  6. Step 6: Final answer
    x = 5,627.60

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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.