Home / 18,507.11-25,540.40-10,123.61

Finding the Fourth Proportional to 18,507.11, 25,540.40 and 10,123.61

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Solution

The fourth proportional to 18,507.11, 25,540.40 and 10,123.61 is: 13,970.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,507.11 : 25,540.40 = 10,123.61 : x
  2. Step 2: Convert to fraction form
    18,507.11/25,540.40 = 10,123.61/x
  3. Step 3: Cross multiply
    18,507.11x = 25,540.40 × 10,123.61
  4. Step 4: Simplify right side
    18,507.11x = 258,560,946.45
  5. Step 5: Solve for x
    x = 258,560,946.45/18,507.11
  6. Step 6: Final answer
    x = 13,970.90

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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.