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Finding the Fourth Proportional to 12,689.74, 17,511.20 and 6,947.04

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Solution

The fourth proportional to 12,689.74, 17,511.20 and 6,947.04 is: 9,586.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.74 : 17,511.20 = 6,947.04 : x
  2. Step 2: Convert to fraction form
    12,689.74/17,511.20 = 6,947.04/x
  3. Step 3: Cross multiply
    12,689.74x = 17,511.20 × 6,947.04
  4. Step 4: Simplify right side
    12,689.74x = 121,651,063.83
  5. Step 5: Solve for x
    x = 121,651,063.83/12,689.74
  6. Step 6: Final answer
    x = 9,586.57

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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.