Home / 12,640.86-18,963.54-4,321.80

Finding the Fourth Proportional to 12,640.86, 18,963.54 and 4,321.80

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Solution

The fourth proportional to 12,640.86, 18,963.54 and 4,321.80 is: 6,483.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.86 : 18,963.54 = 4,321.80 : x
  2. Step 2: Convert to fraction form
    12,640.86/18,963.54 = 4,321.80/x
  3. Step 3: Cross multiply
    12,640.86x = 18,963.54 × 4,321.80
  4. Step 4: Simplify right side
    12,640.86x = 81,956,627.17
  5. Step 5: Solve for x
    x = 81,956,627.17/12,640.86
  6. Step 6: Final answer
    x = 6,483.47

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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.