Home / 12,616.67-18,920.28-5,120.66

Finding the Fourth Proportional to 12,616.67, 18,920.28 and 5,120.66

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Solution

The fourth proportional to 12,616.67, 18,920.28 and 5,120.66 is: 7,679.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,616.67 : 18,920.28 = 5,120.66 : x
  2. Step 2: Convert to fraction form
    12,616.67/18,920.28 = 5,120.66/x
  3. Step 3: Cross multiply
    12,616.67x = 18,920.28 × 5,120.66
  4. Step 4: Simplify right side
    12,616.67x = 96,884,320.98
  5. Step 5: Solve for x
    x = 96,884,320.98/12,616.67
  6. Step 6: Final answer
    x = 7,679.07

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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.