Home / 12,776.31-19,166.76-5,279.90

Finding the Fourth Proportional to 12,776.31, 19,166.76 and 5,279.90

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Solution

The fourth proportional to 12,776.31, 19,166.76 and 5,279.90 is: 7,920.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,776.31 : 19,166.76 = 5,279.90 : x
  2. Step 2: Convert to fraction form
    12,776.31/19,166.76 = 5,279.90/x
  3. Step 3: Cross multiply
    12,776.31x = 19,166.76 × 5,279.90
  4. Step 4: Simplify right side
    12,776.31x = 101,198,480.29
  5. Step 5: Solve for x
    x = 101,198,480.29/12,776.31
  6. Step 6: Final answer
    x = 7,920.79

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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.