Home / 15,116.91-20,855.52-11,147.46

Finding the Fourth Proportional to 15,116.91, 20,855.52 and 11,147.46

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Solution

The fourth proportional to 15,116.91, 20,855.52 and 11,147.46 is: 15,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,116.91 : 20,855.52 = 11,147.46 : x
  2. Step 2: Convert to fraction form
    15,116.91/20,855.52 = 11,147.46/x
  3. Step 3: Cross multiply
    15,116.91x = 20,855.52 × 11,147.46
  4. Step 4: Simplify right side
    15,116.91x = 232,486,074.98
  5. Step 5: Solve for x
    x = 232,486,074.98/15,116.91
  6. Step 6: Final answer
    x = 15,379.21

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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.