Home / 12,429.20-18,643.80-3,664.10

Finding the Fourth Proportional to 12,429.20, 18,643.80 and 3,664.10

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Solution

The fourth proportional to 12,429.20, 18,643.80 and 3,664.10 is: 5,496.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.20 : 18,643.80 = 3,664.10 : x
  2. Step 2: Convert to fraction form
    12,429.20/18,643.80 = 3,664.10/x
  3. Step 3: Cross multiply
    12,429.20x = 18,643.80 × 3,664.10
  4. Step 4: Simplify right side
    12,429.20x = 68,312,747.58
  5. Step 5: Solve for x
    x = 68,312,747.58/12,429.20
  6. Step 6: Final answer
    x = 5,496.15

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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.