Home / 28,294.80-42,391.60-18,906.40

Finding the Fourth Proportional to 28,294.80, 42,391.60 and 18,906.40

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Solution

The fourth proportional to 28,294.80, 42,391.60 and 18,906.40 is: 28,325.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,294.80 : 42,391.60 = 18,906.40 : x
  2. Step 2: Convert to fraction form
    28,294.80/42,391.60 = 18,906.40/x
  3. Step 3: Cross multiply
    28,294.80x = 42,391.60 × 18,906.40
  4. Step 4: Simplify right side
    28,294.80x = 801,472,546.24
  5. Step 5: Solve for x
    x = 801,472,546.24/28,294.80
  6. Step 6: Final answer
    x = 28,325.79

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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.