Home / 13,739.18-18,959.33-7,771.91

Finding the Fourth Proportional to 13,739.18, 18,959.33 and 7,771.91

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Solution

The fourth proportional to 13,739.18, 18,959.33 and 7,771.91 is: 10,724.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.18 : 18,959.33 = 7,771.91 : x
  2. Step 2: Convert to fraction form
    13,739.18/18,959.33 = 7,771.91/x
  3. Step 3: Cross multiply
    13,739.18x = 18,959.33 × 7,771.91
  4. Step 4: Simplify right side
    13,739.18x = 147,350,131.05
  5. Step 5: Solve for x
    x = 147,350,131.05/13,739.18
  6. Step 6: Final answer
    x = 10,724.82

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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.