Home / 12,438.94-18,664.39-7,757.75

Finding the Fourth Proportional to 12,438.94, 18,664.39 and 7,757.75

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Solution

The fourth proportional to 12,438.94, 18,664.39 and 7,757.75 is: 11,640.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.94 : 18,664.39 = 7,757.75 : x
  2. Step 2: Convert to fraction form
    12,438.94/18,664.39 = 7,757.75/x
  3. Step 3: Cross multiply
    12,438.94x = 18,664.39 × 7,757.75
  4. Step 4: Simplify right side
    12,438.94x = 144,793,671.52
  5. Step 5: Solve for x
    x = 144,793,671.52/12,438.94
  6. Step 6: Final answer
    x = 11,640.35

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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.