Home / 13,991.55-20,987.51-4,130.97

Finding the Fourth Proportional to 13,991.55, 20,987.51 and 4,130.97

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Solution

The fourth proportional to 13,991.55, 20,987.51 and 4,130.97 is: 6,196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.55 : 20,987.51 = 4,130.97 : x
  2. Step 2: Convert to fraction form
    13,991.55/20,987.51 = 4,130.97/x
  3. Step 3: Cross multiply
    13,991.55x = 20,987.51 × 4,130.97
  4. Step 4: Simplify right side
    13,991.55x = 86,698,753.53
  5. Step 5: Solve for x
    x = 86,698,753.53/13,991.55
  6. Step 6: Final answer
    x = 6,196.51

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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.