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Finding the Fourth Proportional to 7,891.68, 11,829.20 and 2,625.28

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Solution

The fourth proportional to 7,891.68, 11,829.20 and 2,625.28 is: 3,935.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.68 : 11,829.20 = 2,625.28 : x
  2. Step 2: Convert to fraction form
    7,891.68/11,829.20 = 2,625.28/x
  3. Step 3: Cross multiply
    7,891.68x = 11,829.20 × 2,625.28
  4. Step 4: Simplify right side
    7,891.68x = 31,054,919.48
  5. Step 5: Solve for x
    x = 31,054,919.48/7,891.68
  6. Step 6: Final answer
    x = 3,935.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.