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Finding the Fourth Proportional to 18,269.92, 25,212.39 and 9,886.42

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Solution

The fourth proportional to 18,269.92, 25,212.39 and 9,886.42 is: 13,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,269.92 : 25,212.39 = 9,886.42 : x
  2. Step 2: Convert to fraction form
    18,269.92/25,212.39 = 9,886.42/x
  3. Step 3: Cross multiply
    18,269.92x = 25,212.39 × 9,886.42
  4. Step 4: Simplify right side
    18,269.92x = 249,260,150.68
  5. Step 5: Solve for x
    x = 249,260,150.68/18,269.92
  6. Step 6: Final answer
    x = 13,643.20

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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.