Home / 13,991.18-20,987.45-4,131.23

Finding the Fourth Proportional to 13,991.18, 20,987.45 and 4,131.23

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Solution

The fourth proportional to 13,991.18, 20,987.45 and 4,131.23 is: 6,197.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.18 : 20,987.45 = 4,131.23 : x
  2. Step 2: Convert to fraction form
    13,991.18/20,987.45 = 4,131.23/x
  3. Step 3: Cross multiply
    13,991.18x = 20,987.45 × 4,131.23
  4. Step 4: Simplify right side
    13,991.18x = 86,703,955.23
  5. Step 5: Solve for x
    x = 86,703,955.23/13,991.18
  6. Step 6: Final answer
    x = 6,197.04

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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.