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Finding the Fourth Proportional to 26,405.10, 39,614.10 and 8,636.79

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Solution

The fourth proportional to 26,405.10, 39,614.10 and 8,636.79 is: 12,957.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,405.10 : 39,614.10 = 8,636.79 : x
  2. Step 2: Convert to fraction form
    26,405.10/39,614.10 = 8,636.79/x
  3. Step 3: Cross multiply
    26,405.10x = 39,614.10 × 8,636.79
  4. Step 4: Simplify right side
    26,405.10x = 342,138,662.74
  5. Step 5: Solve for x
    x = 342,138,662.74/26,405.10
  6. Step 6: Final answer
    x = 12,957.29

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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.