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Finding the Fourth Proportional to 18,811.92, 25,963.14 and 10,856.88

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Solution

The fourth proportional to 18,811.92, 25,963.14 and 10,856.88 is: 14,984.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.92 : 25,963.14 = 10,856.88 : x
  2. Step 2: Convert to fraction form
    18,811.92/25,963.14 = 10,856.88/x
  3. Step 3: Cross multiply
    18,811.92x = 25,963.14 × 10,856.88
  4. Step 4: Simplify right side
    18,811.92x = 281,878,695.40
  5. Step 5: Solve for x
    x = 281,878,695.40/18,811.92
  6. Step 6: Final answer
    x = 14,984.05

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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.