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Finding the Fourth Proportional to 58,631.72, 87,895 and 21,183

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Solution

The fourth proportional to 58,631.72, 87,895 and 21,183 is: 31,755.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,631.72 : 87,895 = 21,183 : x
  2. Step 2: Convert to fraction form
    58,631.72/87,895 = 21,183/x
  3. Step 3: Cross multiply
    58,631.72x = 87,895 × 21,183
  4. Step 4: Simplify right side
    58,631.72x = 1,861,879,785
  5. Step 5: Solve for x
    x = 1,861,879,785/58,631.72
  6. Step 6: Final answer
    x = 31,755.50

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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.