Home / 12,315.08-18,443.12-8,974.37

Finding the Fourth Proportional to 12,315.08, 18,443.12 and 8,974.37

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Solution

The fourth proportional to 12,315.08, 18,443.12 and 8,974.37 is: 13,440.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.08 : 18,443.12 = 8,974.37 : x
  2. Step 2: Convert to fraction form
    12,315.08/18,443.12 = 8,974.37/x
  3. Step 3: Cross multiply
    12,315.08x = 18,443.12 × 8,974.37
  4. Step 4: Simplify right side
    12,315.08x = 165,515,245.75
  5. Step 5: Solve for x
    x = 165,515,245.75/12,315.08
  6. Step 6: Final answer
    x = 13,440.05

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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.