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Finding the Fourth Proportional to 19,815.95, 29,715.29 and 7,495.31

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Solution

The fourth proportional to 19,815.95, 29,715.29 and 7,495.31 is: 11,239.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,815.95 : 29,715.29 = 7,495.31 : x
  2. Step 2: Convert to fraction form
    19,815.95/29,715.29 = 7,495.31/x
  3. Step 3: Cross multiply
    19,815.95x = 29,715.29 × 7,495.31
  4. Step 4: Simplify right side
    19,815.95x = 222,725,375.21
  5. Step 5: Solve for x
    x = 222,725,375.21/19,815.95
  6. Step 6: Final answer
    x = 11,239.70

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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.