Home / 28,110.30-42,168.20-8,120.25

Finding the Fourth Proportional to 28,110.30, 42,168.20 and 8,120.25

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Solution

The fourth proportional to 28,110.30, 42,168.20 and 8,120.25 is: 12,181.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,110.30 : 42,168.20 = 8,120.25 : x
  2. Step 2: Convert to fraction form
    28,110.30/42,168.20 = 8,120.25/x
  3. Step 3: Cross multiply
    28,110.30x = 42,168.20 × 8,120.25
  4. Step 4: Simplify right side
    28,110.30x = 342,416,326.05
  5. Step 5: Solve for x
    x = 342,416,326.05/28,110.30
  6. Step 6: Final answer
    x = 12,181.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.