Home / 19,939.90-29,909.96-5,147.81

Finding the Fourth Proportional to 19,939.90, 29,909.96 and 5,147.81

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Solution

The fourth proportional to 19,939.90, 29,909.96 and 5,147.81 is: 7,721.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.90 : 29,909.96 = 5,147.81 : x
  2. Step 2: Convert to fraction form
    19,939.90/29,909.96 = 5,147.81/x
  3. Step 3: Cross multiply
    19,939.90x = 29,909.96 × 5,147.81
  4. Step 4: Simplify right side
    19,939.90x = 153,970,654.51
  5. Step 5: Solve for x
    x = 153,970,654.51/19,939.90
  6. Step 6: Final answer
    x = 7,721.74

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.