Home / 10,204.78-15,292.80-8,115.51

Finding the Fourth Proportional to 10,204.78, 15,292.80 and 8,115.51

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Solution

The fourth proportional to 10,204.78, 15,292.80 and 8,115.51 is: 12,161.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,204.78 : 15,292.80 = 8,115.51 : x
  2. Step 2: Convert to fraction form
    10,204.78/15,292.80 = 8,115.51/x
  3. Step 3: Cross multiply
    10,204.78x = 15,292.80 × 8,115.51
  4. Step 4: Simplify right side
    10,204.78x = 124,108,871.33
  5. Step 5: Solve for x
    x = 124,108,871.33/10,204.78
  6. Step 6: Final answer
    x = 12,161.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.