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Finding the Fourth Proportional to 18,378.66, 27,564.33 and 5,231.16

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Solution

The fourth proportional to 18,378.66, 27,564.33 and 5,231.16 is: 7,845.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.66 : 27,564.33 = 5,231.16 : x
  2. Step 2: Convert to fraction form
    18,378.66/27,564.33 = 5,231.16/x
  3. Step 3: Cross multiply
    18,378.66x = 27,564.33 × 5,231.16
  4. Step 4: Simplify right side
    18,378.66x = 144,193,420.52
  5. Step 5: Solve for x
    x = 144,193,420.52/18,378.66
  6. Step 6: Final answer
    x = 7,845.70

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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.