Home / 8,079.32-12,114.02-3,143.21

Finding the Fourth Proportional to 8,079.32, 12,114.02 and 3,143.21

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Solution

The fourth proportional to 8,079.32, 12,114.02 and 3,143.21 is: 4,712.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,079.32 : 12,114.02 = 3,143.21 : x
  2. Step 2: Convert to fraction form
    8,079.32/12,114.02 = 3,143.21/x
  3. Step 3: Cross multiply
    8,079.32x = 12,114.02 × 3,143.21
  4. Step 4: Simplify right side
    8,079.32x = 38,076,923.37
  5. Step 5: Solve for x
    x = 38,076,923.37/8,079.32
  6. Step 6: Final answer
    x = 4,712.89

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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.