Home / 11,284.71-15,540.62-9,678.68

Finding the Fourth Proportional to 11,284.71, 15,540.62 and 9,678.68

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Solution

The fourth proportional to 11,284.71, 15,540.62 and 9,678.68 is: 13,328.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,284.71 : 15,540.62 = 9,678.68 : x
  2. Step 2: Convert to fraction form
    11,284.71/15,540.62 = 9,678.68/x
  3. Step 3: Cross multiply
    11,284.71x = 15,540.62 × 9,678.68
  4. Step 4: Simplify right side
    11,284.71x = 150,412,687.98
  5. Step 5: Solve for x
    x = 150,412,687.98/11,284.71
  6. Step 6: Final answer
    x = 13,328.89

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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.