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Finding the Fourth Proportional to 8,235.78, 12,353.64 and 2,079.78

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Solution

The fourth proportional to 8,235.78, 12,353.64 and 2,079.78 is: 3,119.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,235.78 : 12,353.64 = 2,079.78 : x
  2. Step 2: Convert to fraction form
    8,235.78/12,353.64 = 2,079.78/x
  3. Step 3: Cross multiply
    8,235.78x = 12,353.64 × 2,079.78
  4. Step 4: Simplify right side
    8,235.78x = 25,692,853.40
  5. Step 5: Solve for x
    x = 25,692,853.40/8,235.78
  6. Step 6: Final answer
    x = 3,119.66

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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.