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Finding the Fourth Proportional to 7,891.92, 10,890.99 and 4,355.28

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Solution

The fourth proportional to 7,891.92, 10,890.99 and 4,355.28 is: 6,010.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.92 : 10,890.99 = 4,355.28 : x
  2. Step 2: Convert to fraction form
    7,891.92/10,890.99 = 4,355.28/x
  3. Step 3: Cross multiply
    7,891.92x = 10,890.99 × 4,355.28
  4. Step 4: Simplify right side
    7,891.92x = 47,433,310.93
  5. Step 5: Solve for x
    x = 47,433,310.93/7,891.92
  6. Step 6: Final answer
    x = 6,010.36

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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.