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Finding the Fourth Proportional to 28,181.60, 42,272.40 and 18,850.40

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Solution

The fourth proportional to 28,181.60, 42,272.40 and 18,850.40 is: 28,275.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.60 : 42,272.40 = 18,850.40 : x
  2. Step 2: Convert to fraction form
    28,181.60/42,272.40 = 18,850.40/x
  3. Step 3: Cross multiply
    28,181.60x = 42,272.40 × 18,850.40
  4. Step 4: Simplify right side
    28,181.60x = 796,851,648.96
  5. Step 5: Solve for x
    x = 796,851,648.96/28,181.60
  6. Step 6: Final answer
    x = 28,275.60

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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.