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Finding the Fourth Proportional to 18,005.60, 26,992.64 and 8,640.96

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Solution

The fourth proportional to 18,005.60, 26,992.64 and 8,640.96 is: 12,953.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.60 : 26,992.64 = 8,640.96 : x
  2. Step 2: Convert to fraction form
    18,005.60/26,992.64 = 8,640.96/x
  3. Step 3: Cross multiply
    18,005.60x = 26,992.64 × 8,640.96
  4. Step 4: Simplify right side
    18,005.60x = 233,242,322.53
  5. Step 5: Solve for x
    x = 233,242,322.53/18,005.60
  6. Step 6: Final answer
    x = 12,953.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.