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Finding the Fourth Proportional to 19,621, 29,431.50 and 5,029

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Solution

The fourth proportional to 19,621, 29,431.50 and 5,029 is: 7,543.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,621 : 29,431.50 = 5,029 : x
  2. Step 2: Convert to fraction form
    19,621/29,431.50 = 5,029/x
  3. Step 3: Cross multiply
    19,621x = 29,431.50 × 5,029
  4. Step 4: Simplify right side
    19,621x = 148,011,013.50
  5. Step 5: Solve for x
    x = 148,011,013.50/19,621
  6. Step 6: Final answer
    x = 7,543.50

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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.