Home / 18,815.65-25,965.89-10,318.55

Finding the Fourth Proportional to 18,815.65, 25,965.89 and 10,318.55

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Solution

The fourth proportional to 18,815.65, 25,965.89 and 10,318.55 is: 14,239.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.65 : 25,965.89 = 10,318.55 : x
  2. Step 2: Convert to fraction form
    18,815.65/25,965.89 = 10,318.55/x
  3. Step 3: Cross multiply
    18,815.65x = 25,965.89 × 10,318.55
  4. Step 4: Simplify right side
    18,815.65x = 267,930,230.23
  5. Step 5: Solve for x
    x = 267,930,230.23/18,815.65
  6. Step 6: Final answer
    x = 14,239.76

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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.