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Finding the Fourth Proportional to 26,409.10, 39,620.10 and 8,640.80

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Solution

The fourth proportional to 26,409.10, 39,620.10 and 8,640.80 is: 12,963.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,409.10 : 39,620.10 = 8,640.80 : x
  2. Step 2: Convert to fraction form
    26,409.10/39,620.10 = 8,640.80/x
  3. Step 3: Cross multiply
    26,409.10x = 39,620.10 × 8,640.80
  4. Step 4: Simplify right side
    26,409.10x = 342,349,360.08
  5. Step 5: Solve for x
    x = 342,349,360.08/26,409.10
  6. Step 6: Final answer
    x = 12,963.31

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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.