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Finding the Fourth Proportional to 19,812.12, 29,718.12 and 5,020.99

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Solution

The fourth proportional to 19,812.12, 29,718.12 and 5,020.99 is: 7,531.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,812.12 : 29,718.12 = 5,020.99 : x
  2. Step 2: Convert to fraction form
    19,812.12/29,718.12 = 5,020.99/x
  3. Step 3: Cross multiply
    19,812.12x = 29,718.12 × 5,020.99
  4. Step 4: Simplify right side
    19,812.12x = 149,214,383.34
  5. Step 5: Solve for x
    x = 149,214,383.34/19,812.12
  6. Step 6: Final answer
    x = 7,531.47

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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.