Home / 15,186.21-20,959.52-9,221.85

Finding the Fourth Proportional to 15,186.21, 20,959.52 and 9,221.85

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Solution

The fourth proportional to 15,186.21, 20,959.52 and 9,221.85 is: 12,727.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,186.21 : 20,959.52 = 9,221.85 : x
  2. Step 2: Convert to fraction form
    15,186.21/20,959.52 = 9,221.85/x
  3. Step 3: Cross multiply
    15,186.21x = 20,959.52 × 9,221.85
  4. Step 4: Simplify right side
    15,186.21x = 193,285,503.40
  5. Step 5: Solve for x
    x = 193,285,503.40/15,186.21
  6. Step 6: Final answer
    x = 12,727.70

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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.