Home / 18,990.20-28,514.10-14,612.60

Finding the Fourth Proportional to 18,990.20, 28,514.10 and 14,612.60

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Solution

The fourth proportional to 18,990.20, 28,514.10 and 14,612.60 is: 21,941.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.20 : 28,514.10 = 14,612.60 : x
  2. Step 2: Convert to fraction form
    18,990.20/28,514.10 = 14,612.60/x
  3. Step 3: Cross multiply
    18,990.20x = 28,514.10 × 14,612.60
  4. Step 4: Simplify right side
    18,990.20x = 416,665,137.66
  5. Step 5: Solve for x
    x = 416,665,137.66/18,990.20
  6. Step 6: Final answer
    x = 21,941.06

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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.