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Finding the Fourth Proportional to 10,891.67, 15,026.13 and 7,900.92

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Solution

The fourth proportional to 10,891.67, 15,026.13 and 7,900.92 is: 10,900.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.67 : 15,026.13 = 7,900.92 : x
  2. Step 2: Convert to fraction form
    10,891.67/15,026.13 = 7,900.92/x
  3. Step 3: Cross multiply
    10,891.67x = 15,026.13 × 7,900.92
  4. Step 4: Simplify right side
    10,891.67x = 118,720,251.04
  5. Step 5: Solve for x
    x = 118,720,251.04/10,891.67
  6. Step 6: Final answer
    x = 10,900.10

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Double scale
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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.