Home / 15,279.30-21,087.81-8,906.09

Finding the Fourth Proportional to 15,279.30, 21,087.81 and 8,906.09

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Solution

The fourth proportional to 15,279.30, 21,087.81 and 8,906.09 is: 12,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.30 : 21,087.81 = 8,906.09 : x
  2. Step 2: Convert to fraction form
    15,279.30/21,087.81 = 8,906.09/x
  3. Step 3: Cross multiply
    15,279.30x = 21,087.81 × 8,906.09
  4. Step 4: Simplify right side
    15,279.30x = 187,809,828.32
  5. Step 5: Solve for x
    x = 187,809,828.32/15,279.30
  6. Step 6: Final answer
    x = 12,291.78

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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.