Home / 19,782.48-29,672.96-4,991.21

Finding the Fourth Proportional to 19,782.48, 29,672.96 and 4,991.21

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Solution

The fourth proportional to 19,782.48, 29,672.96 and 4,991.21 is: 7,486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,782.48 : 29,672.96 = 4,991.21 : x
  2. Step 2: Convert to fraction form
    19,782.48/29,672.96 = 4,991.21/x
  3. Step 3: Cross multiply
    19,782.48x = 29,672.96 × 4,991.21
  4. Step 4: Simplify right side
    19,782.48x = 148,103,801.36
  5. Step 5: Solve for x
    x = 148,103,801.36/19,782.48
  6. Step 6: Final answer
    x = 7,486.61

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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.