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Finding the Fourth Proportional to 12,761.65, 17,611.51 and 7,456.35

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Solution

The fourth proportional to 12,761.65, 17,611.51 and 7,456.35 is: 10,290.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,761.65 : 17,611.51 = 7,456.35 : x
  2. Step 2: Convert to fraction form
    12,761.65/17,611.51 = 7,456.35/x
  3. Step 3: Cross multiply
    12,761.65x = 17,611.51 × 7,456.35
  4. Step 4: Simplify right side
    12,761.65x = 131,317,582.59
  5. Step 5: Solve for x
    x = 131,317,582.59/12,761.65
  6. Step 6: Final answer
    x = 10,290.02

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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.