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Finding the Fourth Proportional to 18,829.92, 25,988.40 and 10,449.12

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Solution

The fourth proportional to 18,829.92, 25,988.40 and 10,449.12 is: 14,421.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,829.92 : 25,988.40 = 10,449.12 : x
  2. Step 2: Convert to fraction form
    18,829.92/25,988.40 = 10,449.12/x
  3. Step 3: Cross multiply
    18,829.92x = 25,988.40 × 10,449.12
  4. Step 4: Simplify right side
    18,829.92x = 271,555,910.21
  5. Step 5: Solve for x
    x = 271,555,910.21/18,829.92
  6. Step 6: Final answer
    x = 14,421.51

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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.