Home / 15,383.15-21,228.75-8,309.57

Finding the Fourth Proportional to 15,383.15, 21,228.75 and 8,309.57

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Solution

The fourth proportional to 15,383.15, 21,228.75 and 8,309.57 is: 11,467.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,383.15 : 21,228.75 = 8,309.57 : x
  2. Step 2: Convert to fraction form
    15,383.15/21,228.75 = 8,309.57/x
  3. Step 3: Cross multiply
    15,383.15x = 21,228.75 × 8,309.57
  4. Step 4: Simplify right side
    15,383.15x = 176,401,784.14
  5. Step 5: Solve for x
    x = 176,401,784.14/15,383.15
  6. Step 6: Final answer
    x = 11,467.21

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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.