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Finding the Fourth Proportional to 18,123.23, 27,187.88 and 5,640.32

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Solution

The fourth proportional to 18,123.23, 27,187.88 and 5,640.32 is: 8,461.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,123.23 : 27,187.88 = 5,640.32 : x
  2. Step 2: Convert to fraction form
    18,123.23/27,187.88 = 5,640.32/x
  3. Step 3: Cross multiply
    18,123.23x = 27,187.88 × 5,640.32
  4. Step 4: Simplify right side
    18,123.23x = 153,348,179.18
  5. Step 5: Solve for x
    x = 153,348,179.18/18,123.23
  6. Step 6: Final answer
    x = 8,461.42

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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.