Home / 15,012.12-20,715.66-8,297.61

Finding the Fourth Proportional to 15,012.12, 20,715.66 and 8,297.61

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Solution

The fourth proportional to 15,012.12, 20,715.66 and 8,297.61 is: 11,450.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.12 : 20,715.66 = 8,297.61 : x
  2. Step 2: Convert to fraction form
    15,012.12/20,715.66 = 8,297.61/x
  3. Step 3: Cross multiply
    15,012.12x = 20,715.66 × 8,297.61
  4. Step 4: Simplify right side
    15,012.12x = 171,890,467.57
  5. Step 5: Solve for x
    x = 171,890,467.57/15,012.12
  6. Step 6: Final answer
    x = 11,450.11

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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.