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Finding the Fourth Proportional to 13,739.11, 18,959.97 and 7,451.49

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Solution

The fourth proportional to 13,739.11, 18,959.97 and 7,451.49 is: 10,283.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.11 : 18,959.97 = 7,451.49 : x
  2. Step 2: Convert to fraction form
    13,739.11/18,959.97 = 7,451.49/x
  3. Step 3: Cross multiply
    13,739.11x = 18,959.97 × 7,451.49
  4. Step 4: Simplify right side
    13,739.11x = 141,280,026.86
  5. Step 5: Solve for x
    x = 141,280,026.86/13,739.11
  6. Step 6: Final answer
    x = 10,283.06

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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.