Home / 15,383.12-21,228.69-8,309.54

Finding the Fourth Proportional to 15,383.12, 21,228.69 and 8,309.54

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Solution

The fourth proportional to 15,383.12, 21,228.69 and 8,309.54 is: 11,467.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,383.12 : 21,228.69 = 8,309.54 : x
  2. Step 2: Convert to fraction form
    15,383.12/21,228.69 = 8,309.54/x
  3. Step 3: Cross multiply
    15,383.12x = 21,228.69 × 8,309.54
  4. Step 4: Simplify right side
    15,383.12x = 176,400,648.70
  5. Step 5: Solve for x
    x = 176,400,648.70/15,383.12
  6. Step 6: Final answer
    x = 11,467.16

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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.