Home / 13,991.58-20,987.38-4,629.09

Finding the Fourth Proportional to 13,991.58, 20,987.38 and 4,629.09

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Solution

The fourth proportional to 13,991.58, 20,987.38 and 4,629.09 is: 6,943.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.58 : 20,987.38 = 4,629.09 : x
  2. Step 2: Convert to fraction form
    13,991.58/20,987.38 = 4,629.09/x
  3. Step 3: Cross multiply
    13,991.58x = 20,987.38 × 4,629.09
  4. Step 4: Simplify right side
    13,991.58x = 97,152,395.27
  5. Step 5: Solve for x
    x = 97,152,395.27/13,991.58
  6. Step 6: Final answer
    x = 6,943.63

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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.