Home / 28,236.80-38,974.08-18,172.16

Finding the Fourth Proportional to 28,236.80, 38,974.08 and 18,172.16

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Solution

The fourth proportional to 28,236.80, 38,974.08 and 18,172.16 is: 25,082.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,236.80 : 38,974.08 = 18,172.16 : x
  2. Step 2: Convert to fraction form
    28,236.80/38,974.08 = 18,172.16/x
  3. Step 3: Cross multiply
    28,236.80x = 38,974.08 × 18,172.16
  4. Step 4: Simplify right side
    28,236.80x = 708,243,217.61
  5. Step 5: Solve for x
    x = 708,243,217.61/28,236.80
  6. Step 6: Final answer
    x = 25,082.28

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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.