Home / 20,036.94-27,640.95-12,480.78

Finding the Fourth Proportional to 20,036.94, 27,640.95 and 12,480.78

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Solution

The fourth proportional to 20,036.94, 27,640.95 and 12,480.78 is: 17,217.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,036.94 : 27,640.95 = 12,480.78 : x
  2. Step 2: Convert to fraction form
    20,036.94/27,640.95 = 12,480.78/x
  3. Step 3: Cross multiply
    20,036.94x = 27,640.95 × 12,480.78
  4. Step 4: Simplify right side
    20,036.94x = 344,980,615.94
  5. Step 5: Solve for x
    x = 344,980,615.94/20,036.94
  6. Step 6: Final answer
    x = 17,217.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.