Home / 13,987.72-20,982.62-4,127.43

Finding the Fourth Proportional to 13,987.72, 20,982.62 and 4,127.43

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Solution

The fourth proportional to 13,987.72, 20,982.62 and 4,127.43 is: 6,191.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.72 : 20,982.62 = 4,127.43 : x
  2. Step 2: Convert to fraction form
    13,987.72/20,982.62 = 4,127.43/x
  3. Step 3: Cross multiply
    13,987.72x = 20,982.62 × 4,127.43
  4. Step 4: Simplify right side
    13,987.72x = 86,604,295.27
  5. Step 5: Solve for x
    x = 86,604,295.27/13,987.72
  6. Step 6: Final answer
    x = 6,191.45

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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.