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Finding the Fourth Proportional to 13,805.43, 20,809.14 and 12,622.17

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Solution

The fourth proportional to 13,805.43, 20,809.14 and 12,622.17 is: 19,025.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,805.43 : 20,809.14 = 12,622.17 : x
  2. Step 2: Convert to fraction form
    13,805.43/20,809.14 = 12,622.17/x
  3. Step 3: Cross multiply
    13,805.43x = 20,809.14 × 12,622.17
  4. Step 4: Simplify right side
    13,805.43x = 262,656,502.63
  5. Step 5: Solve for x
    x = 262,656,502.63/13,805.43
  6. Step 6: Final answer
    x = 19,025.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.