Home / 8,172.86-12,261.11-2,978.74

Finding the Fourth Proportional to 8,172.86, 12,261.11 and 2,978.74

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Solution

The fourth proportional to 8,172.86, 12,261.11 and 2,978.74 is: 4,468.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,172.86 : 12,261.11 = 2,978.74 : x
  2. Step 2: Convert to fraction form
    8,172.86/12,261.11 = 2,978.74/x
  3. Step 3: Cross multiply
    8,172.86x = 12,261.11 × 2,978.74
  4. Step 4: Simplify right side
    8,172.86x = 36,522,604.94
  5. Step 5: Solve for x
    x = 36,522,604.94/8,172.86
  6. Step 6: Final answer
    x = 4,468.77

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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.