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Finding the Fourth Proportional to 8,442.40, 12,663.40 and 3,506.64

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Solution

The fourth proportional to 8,442.40, 12,663.40 and 3,506.64 is: 5,259.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,442.40 : 12,663.40 = 3,506.64 : x
  2. Step 2: Convert to fraction form
    8,442.40/12,663.40 = 3,506.64/x
  3. Step 3: Cross multiply
    8,442.40x = 12,663.40 × 3,506.64
  4. Step 4: Simplify right side
    8,442.40x = 44,405,984.98
  5. Step 5: Solve for x
    x = 44,405,984.98/8,442.40
  6. Step 6: Final answer
    x = 5,259.88

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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.