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Finding the Fourth Proportional to 9,965.99, 13,753.05 and 5,490.05

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Solution

The fourth proportional to 9,965.99, 13,753.05 and 5,490.05 is: 7,576.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,965.99 : 13,753.05 = 5,490.05 : x
  2. Step 2: Convert to fraction form
    9,965.99/13,753.05 = 5,490.05/x
  3. Step 3: Cross multiply
    9,965.99x = 13,753.05 × 5,490.05
  4. Step 4: Simplify right side
    9,965.99x = 75,504,842.80
  5. Step 5: Solve for x
    x = 75,504,842.80/9,965.99
  6. Step 6: Final answer
    x = 7,576.25

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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.