Home / 12,639.92-18,955.22-4,317.66

Finding the Fourth Proportional to 12,639.92, 18,955.22 and 4,317.66

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Solution

The fourth proportional to 12,639.92, 18,955.22 and 4,317.66 is: 6,474.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.92 : 18,955.22 = 4,317.66 : x
  2. Step 2: Convert to fraction form
    12,639.92/18,955.22 = 4,317.66/x
  3. Step 3: Cross multiply
    12,639.92x = 18,955.22 × 4,317.66
  4. Step 4: Simplify right side
    12,639.92x = 81,842,173.60
  5. Step 5: Solve for x
    x = 81,842,173.60/12,639.92
  6. Step 6: Final answer
    x = 6,474.90

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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.