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Finding the Fourth Proportional to 22,310.51, 30,788.25 and 12,878.87

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Solution

The fourth proportional to 22,310.51, 30,788.25 and 12,878.87 is: 17,772.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,310.51 : 30,788.25 = 12,878.87 : x
  2. Step 2: Convert to fraction form
    22,310.51/30,788.25 = 12,878.87/x
  3. Step 3: Cross multiply
    22,310.51x = 30,788.25 × 12,878.87
  4. Step 4: Simplify right side
    22,310.51x = 396,517,869.28
  5. Step 5: Solve for x
    x = 396,517,869.28/22,310.51
  6. Step 6: Final answer
    x = 17,772.69

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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.