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Finding the Fourth Proportional to 26,920.80, 40,381.20 and 13,798.80

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Solution

The fourth proportional to 26,920.80, 40,381.20 and 13,798.80 is: 20,698.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,920.80 : 40,381.20 = 13,798.80 : x
  2. Step 2: Convert to fraction form
    26,920.80/40,381.20 = 13,798.80/x
  3. Step 3: Cross multiply
    26,920.80x = 40,381.20 × 13,798.80
  4. Step 4: Simplify right side
    26,920.80x = 557,212,102.56
  5. Step 5: Solve for x
    x = 557,212,102.56/26,920.80
  6. Step 6: Final answer
    x = 20,698.20

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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.