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Finding the Fourth Proportional to 9,321.80, 13,998.90 and 4,947.80

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Solution

The fourth proportional to 9,321.80, 13,998.90 and 4,947.80 is: 7,430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.80 : 13,998.90 = 4,947.80 : x
  2. Step 2: Convert to fraction form
    9,321.80/13,998.90 = 4,947.80/x
  3. Step 3: Cross multiply
    9,321.80x = 13,998.90 × 4,947.80
  4. Step 4: Simplify right side
    9,321.80x = 69,263,757.42
  5. Step 5: Solve for x
    x = 69,263,757.42/9,321.80
  6. Step 6: Final answer
    x = 7,430.30

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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.