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Finding the Fourth Proportional to 7,220, 9,963.60 and 4,076.12

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Solution

The fourth proportional to 7,220, 9,963.60 and 4,076.12 is: 5,625.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220 : 9,963.60 = 4,076.12 : x
  2. Step 2: Convert to fraction form
    7,220/9,963.60 = 4,076.12/x
  3. Step 3: Cross multiply
    7,220x = 9,963.60 × 4,076.12
  4. Step 4: Simplify right side
    7,220x = 40,612,829.23
  5. Step 5: Solve for x
    x = 40,612,829.23/7,220
  6. Step 6: Final answer
    x = 5,625.05

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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.