Home / 10,106.91-15,127.97-5,415.12

Finding the Fourth Proportional to 10,106.91, 15,127.97 and 5,415.12

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Solution

The fourth proportional to 10,106.91, 15,127.97 and 5,415.12 is: 8,105.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,106.91 : 15,127.97 = 5,415.12 : x
  2. Step 2: Convert to fraction form
    10,106.91/15,127.97 = 5,415.12/x
  3. Step 3: Cross multiply
    10,106.91x = 15,127.97 × 5,415.12
  4. Step 4: Simplify right side
    10,106.91x = 81,919,745.83
  5. Step 5: Solve for x
    x = 81,919,745.83/10,106.91
  6. Step 6: Final answer
    x = 8,105.32

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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.