Home / 10,201.78-15,288.30-8,112.51

Finding the Fourth Proportional to 10,201.78, 15,288.30 and 8,112.51

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Solution

The fourth proportional to 10,201.78, 15,288.30 and 8,112.51 is: 12,157.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,201.78 : 15,288.30 = 8,112.51 : x
  2. Step 2: Convert to fraction form
    10,201.78/15,288.30 = 8,112.51/x
  3. Step 3: Cross multiply
    10,201.78x = 15,288.30 × 8,112.51
  4. Step 4: Simplify right side
    10,201.78x = 124,026,524.85
  5. Step 5: Solve for x
    x = 124,026,524.85/10,201.78
  6. Step 6: Final answer
    x = 12,157.34

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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.