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Finding the Fourth Proportional to 19,802.79, 29,693.52 and 8,696.70

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Solution

The fourth proportional to 19,802.79, 29,693.52 and 8,696.70 is: 13,040.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,802.79 : 29,693.52 = 8,696.70 : x
  2. Step 2: Convert to fraction form
    19,802.79/29,693.52 = 8,696.70/x
  3. Step 3: Cross multiply
    19,802.79x = 29,693.52 × 8,696.70
  4. Step 4: Simplify right side
    19,802.79x = 258,235,635.38
  5. Step 5: Solve for x
    x = 258,235,635.38/19,802.79
  6. Step 6: Final answer
    x = 13,040.37

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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.