Home / 21,878.12-30,182.82-16,226.78

Finding the Fourth Proportional to 21,878.12, 30,182.82 and 16,226.78

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Solution

The fourth proportional to 21,878.12, 30,182.82 and 16,226.78 is: 22,386.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.12 : 30,182.82 = 16,226.78 : x
  2. Step 2: Convert to fraction form
    21,878.12/30,182.82 = 16,226.78/x
  3. Step 3: Cross multiply
    21,878.12x = 30,182.82 × 16,226.78
  4. Step 4: Simplify right side
    21,878.12x = 489,769,829.01
  5. Step 5: Solve for x
    x = 489,769,829.01/21,878.12
  6. Step 6: Final answer
    x = 22,386.28

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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.