Home / 28,380.53-39,168.89-18,338.18

Finding the Fourth Proportional to 28,380.53, 39,168.89 and 18,338.18

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Solution

The fourth proportional to 28,380.53, 39,168.89 and 18,338.18 is: 25,309.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.53 : 39,168.89 = 18,338.18 : x
  2. Step 2: Convert to fraction form
    28,380.53/39,168.89 = 18,338.18/x
  3. Step 3: Cross multiply
    28,380.53x = 39,168.89 × 18,338.18
  4. Step 4: Simplify right side
    28,380.53x = 718,286,155.22
  5. Step 5: Solve for x
    x = 718,286,155.22/28,380.53
  6. Step 6: Final answer
    x = 25,309.12

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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.