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Finding the Fourth Proportional to 7,200.75, 9,937.04 and 3,888.75

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Solution

The fourth proportional to 7,200.75, 9,937.04 and 3,888.75 is: 5,366.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.75 : 9,937.04 = 3,888.75 : x
  2. Step 2: Convert to fraction form
    7,200.75/9,937.04 = 3,888.75/x
  3. Step 3: Cross multiply
    7,200.75x = 9,937.04 × 3,888.75
  4. Step 4: Simplify right side
    7,200.75x = 38,642,644.86
  5. Step 5: Solve for x
    x = 38,642,644.86/7,200.75
  6. Step 6: Final answer
    x = 5,366.48

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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.