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Finding the Fourth Proportional to 20,335.25, 28,080.15 and 12,794.15

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Solution

The fourth proportional to 20,335.25, 28,080.15 and 12,794.15 is: 17,666.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.25 : 28,080.15 = 12,794.15 : x
  2. Step 2: Convert to fraction form
    20,335.25/28,080.15 = 12,794.15/x
  3. Step 3: Cross multiply
    20,335.25x = 28,080.15 × 12,794.15
  4. Step 4: Simplify right side
    20,335.25x = 359,261,651.12
  5. Step 5: Solve for x
    x = 359,261,651.12/20,335.25
  6. Step 6: Final answer
    x = 17,666.94

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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.