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Finding the Fourth Proportional to 8,419.72, 12,631.02 and 4,261.72

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Solution

The fourth proportional to 8,419.72, 12,631.02 and 4,261.72 is: 6,393.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.72 : 12,631.02 = 4,261.72 : x
  2. Step 2: Convert to fraction form
    8,419.72/12,631.02 = 4,261.72/x
  3. Step 3: Cross multiply
    8,419.72x = 12,631.02 × 4,261.72
  4. Step 4: Simplify right side
    8,419.72x = 53,829,870.55
  5. Step 5: Solve for x
    x = 53,829,870.55/8,419.72
  6. Step 6: Final answer
    x = 6,393.31

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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.