Home / 20,743.72-28,618.12-12,772.08

Finding the Fourth Proportional to 20,743.72, 28,618.12 and 12,772.08

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Solution

The fourth proportional to 20,743.72, 28,618.12 and 12,772.08 is: 17,620.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.72 : 28,618.12 = 12,772.08 : x
  2. Step 2: Convert to fraction form
    20,743.72/28,618.12 = 12,772.08/x
  3. Step 3: Cross multiply
    20,743.72x = 28,618.12 × 12,772.08
  4. Step 4: Simplify right side
    20,743.72x = 365,512,918.09
  5. Step 5: Solve for x
    x = 365,512,918.09/20,743.72
  6. Step 6: Final answer
    x = 17,620.41

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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.