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Finding the Fourth Proportional to 7,891.13, 10,890.11 and 4,354.13

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Solution

The fourth proportional to 7,891.13, 10,890.11 and 4,354.13 is: 6,008.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.13 : 10,890.11 = 4,354.13 : x
  2. Step 2: Convert to fraction form
    7,891.13/10,890.11 = 4,354.13/x
  3. Step 3: Cross multiply
    7,891.13x = 10,890.11 × 4,354.13
  4. Step 4: Simplify right side
    7,891.13x = 47,416,954.65
  5. Step 5: Solve for x
    x = 47,416,954.65/7,891.13
  6. Step 6: Final answer
    x = 6,008.89

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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.