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Finding the Fourth Proportional to 18,871.92, 26,031.78 and 12,150.14

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Solution

The fourth proportional to 18,871.92, 26,031.78 and 12,150.14 is: 16,759.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.92 : 26,031.78 = 12,150.14 : x
  2. Step 2: Convert to fraction form
    18,871.92/26,031.78 = 12,150.14/x
  3. Step 3: Cross multiply
    18,871.92x = 26,031.78 × 12,150.14
  4. Step 4: Simplify right side
    18,871.92x = 316,289,641.29
  5. Step 5: Solve for x
    x = 316,289,641.29/18,871.92
  6. Step 6: Final answer
    x = 16,759.80

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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.