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Finding the Fourth Proportional to 12,870.92, 17,767.08 and 10,891.76

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Solution

The fourth proportional to 12,870.92, 17,767.08 and 10,891.76 is: 15,035.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,870.92 : 17,767.08 = 10,891.76 : x
  2. Step 2: Convert to fraction form
    12,870.92/17,767.08 = 10,891.76/x
  3. Step 3: Cross multiply
    12,870.92x = 17,767.08 × 10,891.76
  4. Step 4: Simplify right side
    12,870.92x = 193,514,771.26
  5. Step 5: Solve for x
    x = 193,514,771.26/12,870.92
  6. Step 6: Final answer
    x = 15,035.04

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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.