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Finding the Fourth Proportional to 26,739.80, 40,109.70 and 13,617.80

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Solution

The fourth proportional to 26,739.80, 40,109.70 and 13,617.80 is: 20,426.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,739.80 : 40,109.70 = 13,617.80 : x
  2. Step 2: Convert to fraction form
    26,739.80/40,109.70 = 13,617.80/x
  3. Step 3: Cross multiply
    26,739.80x = 40,109.70 × 13,617.80
  4. Step 4: Simplify right side
    26,739.80x = 546,205,872.66
  5. Step 5: Solve for x
    x = 546,205,872.66/26,739.80
  6. Step 6: Final answer
    x = 20,426.70

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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.