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Finding the Fourth Proportional to 27,045.20, 40,558.20 and 18,725.20

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Solution

The fourth proportional to 27,045.20, 40,558.20 and 18,725.20 is: 28,081.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,045.20 : 40,558.20 = 18,725.20 : x
  2. Step 2: Convert to fraction form
    27,045.20/40,558.20 = 18,725.20/x
  3. Step 3: Cross multiply
    27,045.20x = 40,558.20 × 18,725.20
  4. Step 4: Simplify right side
    27,045.20x = 759,460,406.64
  5. Step 5: Solve for x
    x = 759,460,406.64/27,045.20
  6. Step 6: Final answer
    x = 28,081.15

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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.