Home / 20,219.20-27,903.08-11,721.35

Finding the Fourth Proportional to 20,219.20, 27,903.08 and 11,721.35

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Solution

The fourth proportional to 20,219.20, 27,903.08 and 11,721.35 is: 16,175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.20 : 27,903.08 = 11,721.35 : x
  2. Step 2: Convert to fraction form
    20,219.20/27,903.08 = 11,721.35/x
  3. Step 3: Cross multiply
    20,219.20x = 27,903.08 × 11,721.35
  4. Step 4: Simplify right side
    20,219.20x = 327,061,708.15
  5. Step 5: Solve for x
    x = 327,061,708.15/20,219.20
  6. Step 6: Final answer
    x = 16,175.80

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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.