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Finding the Fourth Proportional to 18,808.80, 25,961.68 and 10,856.62

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Solution

The fourth proportional to 18,808.80, 25,961.68 and 10,856.62 is: 14,985.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.80 : 25,961.68 = 10,856.62 : x
  2. Step 2: Convert to fraction form
    18,808.80/25,961.68 = 10,856.62/x
  3. Step 3: Cross multiply
    18,808.80x = 25,961.68 × 10,856.62
  4. Step 4: Simplify right side
    18,808.80x = 281,856,094.32
  5. Step 5: Solve for x
    x = 281,856,094.32/18,808.80
  6. Step 6: Final answer
    x = 14,985.33

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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.