Home / 15,383.36-21,229.05-8,309.78

Finding the Fourth Proportional to 15,383.36, 21,229.05 and 8,309.78

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Solution

The fourth proportional to 15,383.36, 21,229.05 and 8,309.78 is: 11,467.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,383.36 : 21,229.05 = 8,309.78 : x
  2. Step 2: Convert to fraction form
    15,383.36/21,229.05 = 8,309.78/x
  3. Step 3: Cross multiply
    15,383.36x = 21,229.05 × 8,309.78
  4. Step 4: Simplify right side
    15,383.36x = 176,408,735.11
  5. Step 5: Solve for x
    x = 176,408,735.11/15,383.36
  6. Step 6: Final answer
    x = 11,467.50

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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.