Home / 12,638.39-18,964.40-5,247.95

Finding the Fourth Proportional to 12,638.39, 18,964.40 and 5,247.95

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Solution

The fourth proportional to 12,638.39, 18,964.40 and 5,247.95 is: 7,874.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.39 : 18,964.40 = 5,247.95 : x
  2. Step 2: Convert to fraction form
    12,638.39/18,964.40 = 5,247.95/x
  3. Step 3: Cross multiply
    12,638.39x = 18,964.40 × 5,247.95
  4. Step 4: Simplify right side
    12,638.39x = 99,524,101.92
  5. Step 5: Solve for x
    x = 99,524,101.92/12,638.39
  6. Step 6: Final answer
    x = 7,874.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.