Home / 12,849.12-19,278-10,648.80

Finding the Fourth Proportional to 12,849.12, 19,278 and 10,648.80

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Solution

The fourth proportional to 12,849.12, 19,278 and 10,648.80 is: 15,976.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,849.12 : 19,278 = 10,648.80 : x
  2. Step 2: Convert to fraction form
    12,849.12/19,278 = 10,648.80/x
  3. Step 3: Cross multiply
    12,849.12x = 19,278 × 10,648.80
  4. Step 4: Simplify right side
    12,849.12x = 205,287,566.40
  5. Step 5: Solve for x
    x = 205,287,566.40/12,849.12
  6. Step 6: Final answer
    x = 15,976.78

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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.