Home / 13,738.88-18,959.52-7,451.12

Finding the Fourth Proportional to 13,738.88, 18,959.52 and 7,451.12

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Solution

The fourth proportional to 13,738.88, 18,959.52 and 7,451.12 is: 10,282.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,738.88 : 18,959.52 = 7,451.12 : x
  2. Step 2: Convert to fraction form
    13,738.88/18,959.52 = 7,451.12/x
  3. Step 3: Cross multiply
    13,738.88x = 18,959.52 × 7,451.12
  4. Step 4: Simplify right side
    13,738.88x = 141,269,658.66
  5. Step 5: Solve for x
    x = 141,269,658.66/13,738.88
  6. Step 6: Final answer
    x = 10,282.47

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Double scale
Find fourth proportional to 13,739.88, 18,960.90 and 7,452.12
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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.