Home / 15,221.08-20,994.72-13,228.24

Finding the Fourth Proportional to 15,221.08, 20,994.72 and 13,228.24

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Solution

The fourth proportional to 15,221.08, 20,994.72 and 13,228.24 is: 18,245.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.08 : 20,994.72 = 13,228.24 : x
  2. Step 2: Convert to fraction form
    15,221.08/20,994.72 = 13,228.24/x
  3. Step 3: Cross multiply
    15,221.08x = 20,994.72 × 13,228.24
  4. Step 4: Simplify right side
    15,221.08x = 277,723,194.89
  5. Step 5: Solve for x
    x = 277,723,194.89/15,221.08
  6. Step 6: Final answer
    x = 18,245.96

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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.