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Finding the Fourth Proportional to 8,130.72, 12,195.80 and 3,447.72

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Solution

The fourth proportional to 8,130.72, 12,195.80 and 3,447.72 is: 5,171.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.72 : 12,195.80 = 3,447.72 : x
  2. Step 2: Convert to fraction form
    8,130.72/12,195.80 = 3,447.72/x
  3. Step 3: Cross multiply
    8,130.72x = 12,195.80 × 3,447.72
  4. Step 4: Simplify right side
    8,130.72x = 42,047,712.20
  5. Step 5: Solve for x
    x = 42,047,712.20/8,130.72
  6. Step 6: Final answer
    x = 5,171.46

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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.