Home / 12,429.19-17,152.31-6,840.19

Finding the Fourth Proportional to 12,429.19, 17,152.31 and 6,840.19

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Solution

The fourth proportional to 12,429.19, 17,152.31 and 6,840.19 is: 9,439.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.19 : 17,152.31 = 6,840.19 : x
  2. Step 2: Convert to fraction form
    12,429.19/17,152.31 = 6,840.19/x
  3. Step 3: Cross multiply
    12,429.19x = 17,152.31 × 6,840.19
  4. Step 4: Simplify right side
    12,429.19x = 117,325,033.56
  5. Step 5: Solve for x
    x = 117,325,033.56/12,429.19
  6. Step 6: Final answer
    x = 9,439.48

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Half scale
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Double scale
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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.