Home / 13,712.25-18,923.73-7,743.78

Finding the Fourth Proportional to 13,712.25, 18,923.73 and 7,743.78

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Solution

The fourth proportional to 13,712.25, 18,923.73 and 7,743.78 is: 10,686.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,712.25 : 18,923.73 = 7,743.78 : x
  2. Step 2: Convert to fraction form
    13,712.25/18,923.73 = 7,743.78/x
  3. Step 3: Cross multiply
    13,712.25x = 18,923.73 × 7,743.78
  4. Step 4: Simplify right side
    13,712.25x = 146,541,201.90
  5. Step 5: Solve for x
    x = 146,541,201.90/13,712.25
  6. Step 6: Final answer
    x = 10,686.88

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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.