Home / 20,743.74-28,626.78-12,785.52

Finding the Fourth Proportional to 20,743.74, 28,626.78 and 12,785.52

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Solution

The fourth proportional to 20,743.74, 28,626.78 and 12,785.52 is: 17,644.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.74 : 28,626.78 = 12,785.52 : x
  2. Step 2: Convert to fraction form
    20,743.74/28,626.78 = 12,785.52/x
  3. Step 3: Cross multiply
    20,743.74x = 28,626.78 × 12,785.52
  4. Step 4: Simplify right side
    20,743.74x = 366,008,268.23
  5. Step 5: Solve for x
    x = 366,008,268.23/20,743.74
  6. Step 6: Final answer
    x = 17,644.28

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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.