Home / 13,655.78-18,844.75-7,687.43

Finding the Fourth Proportional to 13,655.78, 18,844.75 and 7,687.43

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Solution

The fourth proportional to 13,655.78, 18,844.75 and 7,687.43 is: 10,608.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.78 : 18,844.75 = 7,687.43 : x
  2. Step 2: Convert to fraction form
    13,655.78/18,844.75 = 7,687.43/x
  3. Step 3: Cross multiply
    13,655.78x = 18,844.75 × 7,687.43
  4. Step 4: Simplify right side
    13,655.78x = 144,867,696.49
  5. Step 5: Solve for x
    x = 144,867,696.49/13,655.78
  6. Step 6: Final answer
    x = 10,608.53

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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.