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Finding the Fourth Proportional to 9,479.40, 13,081.62 and 5,287.64

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Solution

The fourth proportional to 9,479.40, 13,081.62 and 5,287.64 is: 7,296.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,479.40 : 13,081.62 = 5,287.64 : x
  2. Step 2: Convert to fraction form
    9,479.40/13,081.62 = 5,287.64/x
  3. Step 3: Cross multiply
    9,479.40x = 13,081.62 × 5,287.64
  4. Step 4: Simplify right side
    9,479.40x = 69,170,897.18
  5. Step 5: Solve for x
    x = 69,170,897.18/9,479.40
  6. Step 6: Final answer
    x = 7,296.97

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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.