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Finding the Fourth Proportional to 18,555.32, 27,832.98 and 5,407.40

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Solution

The fourth proportional to 18,555.32, 27,832.98 and 5,407.40 is: 8,111.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.32 : 27,832.98 = 5,407.40 : x
  2. Step 2: Convert to fraction form
    18,555.32/27,832.98 = 5,407.40/x
  3. Step 3: Cross multiply
    18,555.32x = 27,832.98 × 5,407.40
  4. Step 4: Simplify right side
    18,555.32x = 150,504,056.05
  5. Step 5: Solve for x
    x = 150,504,056.05/18,555.32
  6. Step 6: Final answer
    x = 8,111.10

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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.