Home / 21,878.61-30,175.25-16,519.05

Finding the Fourth Proportional to 21,878.61, 30,175.25 and 16,519.05

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Solution

The fourth proportional to 21,878.61, 30,175.25 and 16,519.05 is: 22,783.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.61 : 30,175.25 = 16,519.05 : x
  2. Step 2: Convert to fraction form
    21,878.61/30,175.25 = 16,519.05/x
  3. Step 3: Cross multiply
    21,878.61x = 30,175.25 × 16,519.05
  4. Step 4: Simplify right side
    21,878.61x = 498,466,380.92
  5. Step 5: Solve for x
    x = 498,466,380.92/21,878.61
  6. Step 6: Final answer
    x = 22,783.27

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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.