Home / 8,115.90-12,172.47-2,271.15

Finding the Fourth Proportional to 8,115.90, 12,172.47 and 2,271.15

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Solution

The fourth proportional to 8,115.90, 12,172.47 and 2,271.15 is: 3,406.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.90 : 12,172.47 = 2,271.15 : x
  2. Step 2: Convert to fraction form
    8,115.90/12,172.47 = 2,271.15/x
  3. Step 3: Cross multiply
    8,115.90x = 12,172.47 × 2,271.15
  4. Step 4: Simplify right side
    8,115.90x = 27,645,505.24
  5. Step 5: Solve for x
    x = 27,645,505.24/8,115.90
  6. Step 6: Final answer
    x = 3,406.34

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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.