Home / 12,626.09-18,918.20-7,680.77

Finding the Fourth Proportional to 12,626.09, 18,918.20 and 7,680.77

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Solution

The fourth proportional to 12,626.09, 18,918.20 and 7,680.77 is: 11,508.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,626.09 : 18,918.20 = 7,680.77 : x
  2. Step 2: Convert to fraction form
    12,626.09/18,918.20 = 7,680.77/x
  3. Step 3: Cross multiply
    12,626.09x = 18,918.20 × 7,680.77
  4. Step 4: Simplify right side
    12,626.09x = 145,306,304.61
  5. Step 5: Solve for x
    x = 145,306,304.61/12,626.09
  6. Step 6: Final answer
    x = 11,508.42

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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.