Home / 20,738.72-28,618.40-11,785.04

Finding the Fourth Proportional to 20,738.72, 28,618.40 and 11,785.04

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Solution

The fourth proportional to 20,738.72, 28,618.40 and 11,785.04 is: 16,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.72 : 28,618.40 = 11,785.04 : x
  2. Step 2: Convert to fraction form
    20,738.72/28,618.40 = 11,785.04/x
  3. Step 3: Cross multiply
    20,738.72x = 28,618.40 × 11,785.04
  4. Step 4: Simplify right side
    20,738.72x = 337,268,988.74
  5. Step 5: Solve for x
    x = 337,268,988.74/20,738.72
  6. Step 6: Final answer
    x = 16,262.77

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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.