Home / 19,781.91-29,671.83-4,990.97

Finding the Fourth Proportional to 19,781.91, 29,671.83 and 4,990.97

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Solution

The fourth proportional to 19,781.91, 29,671.83 and 4,990.97 is: 7,486.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.91 : 29,671.83 = 4,990.97 : x
  2. Step 2: Convert to fraction form
    19,781.91/29,671.83 = 4,990.97/x
  3. Step 3: Cross multiply
    19,781.91x = 29,671.83 × 4,990.97
  4. Step 4: Simplify right side
    19,781.91x = 148,091,065.02
  5. Step 5: Solve for x
    x = 148,091,065.02/19,781.91
  6. Step 6: Final answer
    x = 7,486.19

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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.