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Finding the Fourth Proportional to 18,572.28, 27,858.54 and 4,721.32

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Solution

The fourth proportional to 18,572.28, 27,858.54 and 4,721.32 is: 7,082.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.28 : 27,858.54 = 4,721.32 : x
  2. Step 2: Convert to fraction form
    18,572.28/27,858.54 = 4,721.32/x
  3. Step 3: Cross multiply
    18,572.28x = 27,858.54 × 4,721.32
  4. Step 4: Simplify right side
    18,572.28x = 131,529,082.07
  5. Step 5: Solve for x
    x = 131,529,082.07/18,572.28
  6. Step 6: Final answer
    x = 7,082.01

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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.