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Finding the Fourth Proportional to 8,438.40, 12,643.40 and 4,046.24

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Solution

The fourth proportional to 8,438.40, 12,643.40 and 4,046.24 is: 6,062.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.40 : 12,643.40 = 4,046.24 : x
  2. Step 2: Convert to fraction form
    8,438.40/12,643.40 = 4,046.24/x
  3. Step 3: Cross multiply
    8,438.40x = 12,643.40 × 4,046.24
  4. Step 4: Simplify right side
    8,438.40x = 51,158,230.82
  5. Step 5: Solve for x
    x = 51,158,230.82/8,438.40
  6. Step 6: Final answer
    x = 6,062.55

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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.