Home / 21,850.82-30,155.20-12,290.90

Finding the Fourth Proportional to 21,850.82, 30,155.20 and 12,290.90

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Solution

The fourth proportional to 21,850.82, 30,155.20 and 12,290.90 is: 16,962.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.82 : 30,155.20 = 12,290.90 : x
  2. Step 2: Convert to fraction form
    21,850.82/30,155.20 = 12,290.90/x
  3. Step 3: Cross multiply
    21,850.82x = 30,155.20 × 12,290.90
  4. Step 4: Simplify right side
    21,850.82x = 370,634,547.68
  5. Step 5: Solve for x
    x = 370,634,547.68/21,850.82
  6. Step 6: Final answer
    x = 16,962.04

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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.