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Finding the Fourth Proportional to 18,755.75, 28,133.90 and 4,904.75

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Solution

The fourth proportional to 18,755.75, 28,133.90 and 4,904.75 is: 7,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.75 : 28,133.90 = 4,904.75 : x
  2. Step 2: Convert to fraction form
    18,755.75/28,133.90 = 4,904.75/x
  3. Step 3: Cross multiply
    18,755.75x = 28,133.90 × 4,904.75
  4. Step 4: Simplify right side
    18,755.75x = 137,989,721.50
  5. Step 5: Solve for x
    x = 137,989,721.50/18,755.75
  6. Step 6: Final answer
    x = 7,357.20

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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.