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Finding the Fourth Proportional to 28,223.72, 38,947.11 and 15,474.44

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Solution

The fourth proportional to 28,223.72, 38,947.11 and 15,474.44 is: 21,353.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,223.72 : 38,947.11 = 15,474.44 : x
  2. Step 2: Convert to fraction form
    28,223.72/38,947.11 = 15,474.44/x
  3. Step 3: Cross multiply
    28,223.72x = 38,947.11 × 15,474.44
  4. Step 4: Simplify right side
    28,223.72x = 602,684,716.87
  5. Step 5: Solve for x
    x = 602,684,716.87/28,223.72
  6. Step 6: Final answer
    x = 21,353.84

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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.