Home / 12,639.92-18,962.11-4,317.99

Finding the Fourth Proportional to 12,639.92, 18,962.11 and 4,317.99

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Solution

The fourth proportional to 12,639.92, 18,962.11 and 4,317.99 is: 6,477.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.92 : 18,962.11 = 4,317.99 : x
  2. Step 2: Convert to fraction form
    12,639.92/18,962.11 = 4,317.99/x
  3. Step 3: Cross multiply
    12,639.92x = 18,962.11 × 4,317.99
  4. Step 4: Simplify right side
    12,639.92x = 81,878,201.36
  5. Step 5: Solve for x
    x = 81,878,201.36/12,639.92
  6. Step 6: Final answer
    x = 6,477.75

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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.