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Finding the Fourth Proportional to 19,663.88, 29,500.67 and 5,812.88

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Solution

The fourth proportional to 19,663.88, 29,500.67 and 5,812.88 is: 8,720.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,663.88 : 29,500.67 = 5,812.88 : x
  2. Step 2: Convert to fraction form
    19,663.88/29,500.67 = 5,812.88/x
  3. Step 3: Cross multiply
    19,663.88x = 29,500.67 × 5,812.88
  4. Step 4: Simplify right side
    19,663.88x = 171,483,721.66
  5. Step 5: Solve for x
    x = 171,483,721.66/19,663.88
  6. Step 6: Final answer
    x = 8,720.75

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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.