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Finding the Fourth Proportional to 26,340.80, 39,522.90 and 13,857.80

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Solution

The fourth proportional to 26,340.80, 39,522.90 and 13,857.80 is: 20,792.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,340.80 : 39,522.90 = 13,857.80 : x
  2. Step 2: Convert to fraction form
    26,340.80/39,522.90 = 13,857.80/x
  3. Step 3: Cross multiply
    26,340.80x = 39,522.90 × 13,857.80
  4. Step 4: Simplify right side
    26,340.80x = 547,700,443.62
  5. Step 5: Solve for x
    x = 547,700,443.62/26,340.80
  6. Step 6: Final answer
    x = 20,792.86

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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.