Home / 12,639.78-18,961.36-4,317.56

Finding the Fourth Proportional to 12,639.78, 18,961.36 and 4,317.56

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Solution

The fourth proportional to 12,639.78, 18,961.36 and 4,317.56 is: 6,476.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.78 : 18,961.36 = 4,317.56 : x
  2. Step 2: Convert to fraction form
    12,639.78/18,961.36 = 4,317.56/x
  3. Step 3: Cross multiply
    12,639.78x = 18,961.36 × 4,317.56
  4. Step 4: Simplify right side
    12,639.78x = 81,866,809.48
  5. Step 5: Solve for x
    x = 81,866,809.48/12,639.78
  6. Step 6: Final answer
    x = 6,476.92

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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.