Home / 28,205.25-38,912.18-18,132.09

Finding the Fourth Proportional to 28,205.25, 38,912.18 and 18,132.09

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Solution

The fourth proportional to 28,205.25, 38,912.18 and 18,132.09 is: 25,015.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.25 : 38,912.18 = 18,132.09 : x
  2. Step 2: Convert to fraction form
    28,205.25/38,912.18 = 18,132.09/x
  3. Step 3: Cross multiply
    28,205.25x = 38,912.18 × 18,132.09
  4. Step 4: Simplify right side
    28,205.25x = 705,559,059.20
  5. Step 5: Solve for x
    x = 705,559,059.20/28,205.25
  6. Step 6: Final answer
    x = 25,015.17

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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.