Home / 13,781.12-20,671.90-3,920.65

Finding the Fourth Proportional to 13,781.12, 20,671.90 and 3,920.65

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Solution

The fourth proportional to 13,781.12, 20,671.90 and 3,920.65 is: 5,881.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.12 : 20,671.90 = 3,920.65 : x
  2. Step 2: Convert to fraction form
    13,781.12/20,671.90 = 3,920.65/x
  3. Step 3: Cross multiply
    13,781.12x = 20,671.90 × 3,920.65
  4. Step 4: Simplify right side
    13,781.12x = 81,047,181.38
  5. Step 5: Solve for x
    x = 81,047,181.38/13,781.12
  6. Step 6: Final answer
    x = 5,881.03

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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.