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Finding the Fourth Proportional to 9,955.84, 13,739.40 and 5,479.92

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Solution

The fourth proportional to 9,955.84, 13,739.40 and 5,479.92 is: 7,562.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,955.84 : 13,739.40 = 5,479.92 : x
  2. Step 2: Convert to fraction form
    9,955.84/13,739.40 = 5,479.92/x
  3. Step 3: Cross multiply
    9,955.84x = 13,739.40 × 5,479.92
  4. Step 4: Simplify right side
    9,955.84x = 75,290,812.85
  5. Step 5: Solve for x
    x = 75,290,812.85/9,955.84
  6. Step 6: Final answer
    x = 7,562.48

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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.