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Finding the Fourth Proportional to 7,500.75, 10,275.99 and 7,220.40

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Solution

The fourth proportional to 7,500.75, 10,275.99 and 7,220.40 is: 9,891.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,500.75 : 10,275.99 = 7,220.40 : x
  2. Step 2: Convert to fraction form
    7,500.75/10,275.99 = 7,220.40/x
  3. Step 3: Cross multiply
    7,500.75x = 10,275.99 × 7,220.40
  4. Step 4: Simplify right side
    7,500.75x = 74,196,758.20
  5. Step 5: Solve for x
    x = 74,196,758.20/7,500.75
  6. Step 6: Final answer
    x = 9,891.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.