Home / 13,991.58-20,985.56-4,131.90

Finding the Fourth Proportional to 13,991.58, 20,985.56 and 4,131.90

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Solution

The fourth proportional to 13,991.58, 20,985.56 and 4,131.90 is: 6,197.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.58 : 20,985.56 = 4,131.90 : x
  2. Step 2: Convert to fraction form
    13,991.58/20,985.56 = 4,131.90/x
  3. Step 3: Cross multiply
    13,991.58x = 20,985.56 × 4,131.90
  4. Step 4: Simplify right side
    13,991.58x = 86,710,235.36
  5. Step 5: Solve for x
    x = 86,710,235.36/13,991.58
  6. Step 6: Final answer
    x = 6,197.32

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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.