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Finding the Fourth Proportional to 9,902.75, 13,665.80 and 5,486.75

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Solution

The fourth proportional to 9,902.75, 13,665.80 and 5,486.75 is: 7,571.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,902.75 : 13,665.80 = 5,486.75 : x
  2. Step 2: Convert to fraction form
    9,902.75/13,665.80 = 5,486.75/x
  3. Step 3: Cross multiply
    9,902.75x = 13,665.80 × 5,486.75
  4. Step 4: Simplify right side
    9,902.75x = 74,980,800.72
  5. Step 5: Solve for x
    x = 74,980,800.72/9,902.75
  6. Step 6: Final answer
    x = 7,571.72

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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.