Home / 18,618.38-25,715.30-12,319.82

Finding the Fourth Proportional to 18,618.38, 25,715.30 and 12,319.82

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Solution

The fourth proportional to 18,618.38, 25,715.30 and 12,319.82 is: 17,015.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.38 : 25,715.30 = 12,319.82 : x
  2. Step 2: Convert to fraction form
    18,618.38/25,715.30 = 12,319.82/x
  3. Step 3: Cross multiply
    18,618.38x = 25,715.30 × 12,319.82
  4. Step 4: Simplify right side
    18,618.38x = 316,807,867.25
  5. Step 5: Solve for x
    x = 316,807,867.25/18,618.38
  6. Step 6: Final answer
    x = 17,015.87

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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.