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Finding the Fourth Proportional to 19,765.31, 29,651.92 and 7,285.39

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Solution

The fourth proportional to 19,765.31, 29,651.92 and 7,285.39 is: 10,929.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,765.31 : 29,651.92 = 7,285.39 : x
  2. Step 2: Convert to fraction form
    19,765.31/29,651.92 = 7,285.39/x
  3. Step 3: Cross multiply
    19,765.31x = 29,651.92 × 7,285.39
  4. Step 4: Simplify right side
    19,765.31x = 216,025,653.19
  5. Step 5: Solve for x
    x = 216,025,653.19/19,765.31
  6. Step 6: Final answer
    x = 10,929.54

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1.5x scale

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.