Home / 19,781.13-29,671.70-4,991.21

Finding the Fourth Proportional to 19,781.13, 29,671.70 and 4,991.21

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Solution

The fourth proportional to 19,781.13, 29,671.70 and 4,991.21 is: 7,486.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.13 : 29,671.70 = 4,991.21 : x
  2. Step 2: Convert to fraction form
    19,781.13/29,671.70 = 4,991.21/x
  3. Step 3: Cross multiply
    19,781.13x = 29,671.70 × 4,991.21
  4. Step 4: Simplify right side
    19,781.13x = 148,097,512.44
  5. Step 5: Solve for x
    x = 148,097,512.44/19,781.13
  6. Step 6: Final answer
    x = 7,486.81

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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.