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Finding the Fourth Proportional to 18,612.59, 27,921.95 and 8,627.31

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Solution

The fourth proportional to 18,612.59, 27,921.95 and 8,627.31 is: 12,942.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.59 : 27,921.95 = 8,627.31 : x
  2. Step 2: Convert to fraction form
    18,612.59/27,921.95 = 8,627.31/x
  3. Step 3: Cross multiply
    18,612.59x = 27,921.95 × 8,627.31
  4. Step 4: Simplify right side
    18,612.59x = 240,891,275.32
  5. Step 5: Solve for x
    x = 240,891,275.32/18,612.59
  6. Step 6: Final answer
    x = 12,942.39

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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.