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Finding the Fourth Proportional to 18,708.17, 25,819.09 and 13,984.25

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Solution

The fourth proportional to 18,708.17, 25,819.09 and 13,984.25 is: 19,299.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.17 : 25,819.09 = 13,984.25 : x
  2. Step 2: Convert to fraction form
    18,708.17/25,819.09 = 13,984.25/x
  3. Step 3: Cross multiply
    18,708.17x = 25,819.09 × 13,984.25
  4. Step 4: Simplify right side
    18,708.17x = 361,060,445.28
  5. Step 5: Solve for x
    x = 361,060,445.28/18,708.17
  6. Step 6: Final answer
    x = 19,299.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.