Home / 18,821.03-28,236.20-13,285.22

Finding the Fourth Proportional to 18,821.03, 28,236.20 and 13,285.22

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Solution

The fourth proportional to 18,821.03, 28,236.20 and 13,285.22 is: 19,931.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.03 : 28,236.20 = 13,285.22 : x
  2. Step 2: Convert to fraction form
    18,821.03/28,236.20 = 13,285.22/x
  3. Step 3: Cross multiply
    18,821.03x = 28,236.20 × 13,285.22
  4. Step 4: Simplify right side
    18,821.03x = 375,123,921.36
  5. Step 5: Solve for x
    x = 375,123,921.36/18,821.03
  6. Step 6: Final answer
    x = 19,931.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.