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Finding the Fourth Proportional to 20,799.97, 28,703.91 and 11,847.47

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Solution

The fourth proportional to 20,799.97, 28,703.91 and 11,847.47 is: 16,349.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.97 : 28,703.91 = 11,847.47 : x
  2. Step 2: Convert to fraction form
    20,799.97/28,703.91 = 11,847.47/x
  3. Step 3: Cross multiply
    20,799.97x = 28,703.91 × 11,847.47
  4. Step 4: Simplify right side
    20,799.97x = 340,068,712.61
  5. Step 5: Solve for x
    x = 340,068,712.61/20,799.97
  6. Step 6: Final answer
    x = 16,349.48

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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.