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Finding the Fourth Proportional to 19,193.15, 28,747.98 and 9,311.63

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Solution

The fourth proportional to 19,193.15, 28,747.98 and 9,311.63 is: 13,947.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,193.15 : 28,747.98 = 9,311.63 : x
  2. Step 2: Convert to fraction form
    19,193.15/28,747.98 = 9,311.63/x
  3. Step 3: Cross multiply
    19,193.15x = 28,747.98 × 9,311.63
  4. Step 4: Simplify right side
    19,193.15x = 267,690,409.27
  5. Step 5: Solve for x
    x = 267,690,409.27/19,193.15
  6. Step 6: Final answer
    x = 13,947.18

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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.