Home / 18,631.12-25,693.30-11,918.87

Finding the Fourth Proportional to 18,631.12, 25,693.30 and 11,918.87

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Solution

The fourth proportional to 18,631.12, 25,693.30 and 11,918.87 is: 16,436.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,631.12 : 25,693.30 = 11,918.87 : x
  2. Step 2: Convert to fraction form
    18,631.12/25,693.30 = 11,918.87/x
  3. Step 3: Cross multiply
    18,631.12x = 25,693.30 × 11,918.87
  4. Step 4: Simplify right side
    18,631.12x = 306,235,102.57
  5. Step 5: Solve for x
    x = 306,235,102.57/18,631.12
  6. Step 6: Final answer
    x = 16,436.75

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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.