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Finding the Fourth Proportional to 20,734, 28,612.93 and 11,781.51

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Solution

The fourth proportional to 20,734, 28,612.93 and 11,781.51 is: 16,258.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,734 : 28,612.93 = 11,781.51 : x
  2. Step 2: Convert to fraction form
    20,734/28,612.93 = 11,781.51/x
  3. Step 3: Cross multiply
    20,734x = 28,612.93 × 11,781.51
  4. Step 4: Simplify right side
    20,734x = 337,103,520.92
  5. Step 5: Solve for x
    x = 337,103,520.92/20,734
  6. Step 6: Final answer
    x = 16,258.49

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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.