Home / 13,215.15-18,237.75-8,731.04

Finding the Fourth Proportional to 13,215.15, 18,237.75 and 8,731.04

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Solution

The fourth proportional to 13,215.15, 18,237.75 and 8,731.04 is: 12,049.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.15 : 18,237.75 = 8,731.04 : x
  2. Step 2: Convert to fraction form
    13,215.15/18,237.75 = 8,731.04/x
  3. Step 3: Cross multiply
    13,215.15x = 18,237.75 × 8,731.04
  4. Step 4: Simplify right side
    13,215.15x = 159,234,433.57
  5. Step 5: Solve for x
    x = 159,234,433.57/13,215.15
  6. Step 6: Final answer
    x = 12,049.39

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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.