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Finding the Fourth Proportional to 7,200.66, 9,937.10 and 3,970.60

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Solution

The fourth proportional to 7,200.66, 9,937.10 and 3,970.60 is: 5,479.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.66 : 9,937.10 = 3,970.60 : x
  2. Step 2: Convert to fraction form
    7,200.66/9,937.10 = 3,970.60/x
  3. Step 3: Cross multiply
    7,200.66x = 9,937.10 × 3,970.60
  4. Step 4: Simplify right side
    7,200.66x = 39,456,249.26
  5. Step 5: Solve for x
    x = 39,456,249.26/7,200.66
  6. Step 6: Final answer
    x = 5,479.53

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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.