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Finding the Fourth Proportional to 17,891.12, 26,826.12 and 5,407.40

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Solution

The fourth proportional to 17,891.12, 26,826.12 and 5,407.40 is: 8,107.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,891.12 : 26,826.12 = 5,407.40 : x
  2. Step 2: Convert to fraction form
    17,891.12/26,826.12 = 5,407.40/x
  3. Step 3: Cross multiply
    17,891.12x = 26,826.12 × 5,407.40
  4. Step 4: Simplify right side
    17,891.12x = 145,059,561.29
  5. Step 5: Solve for x
    x = 145,059,561.29/17,891.12
  6. Step 6: Final answer
    x = 8,107.91

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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.