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Finding the Fourth Proportional to 12,429.44, 17,152.66 and 6,840.44

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Solution

The fourth proportional to 12,429.44, 17,152.66 and 6,840.44 is: 9,439.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.44 : 17,152.66 = 6,840.44 : x
  2. Step 2: Convert to fraction form
    12,429.44/17,152.66 = 6,840.44/x
  3. Step 3: Cross multiply
    12,429.44x = 17,152.66 × 6,840.44
  4. Step 4: Simplify right side
    12,429.44x = 117,331,741.57
  5. Step 5: Solve for x
    x = 117,331,741.57/12,429.44
  6. Step 6: Final answer
    x = 9,439.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.