Home / 13,991.05-20,986.76-4,130.47

Finding the Fourth Proportional to 13,991.05, 20,986.76 and 4,130.47

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Solution

The fourth proportional to 13,991.05, 20,986.76 and 4,130.47 is: 6,195.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.05 : 20,986.76 = 4,130.47 : x
  2. Step 2: Convert to fraction form
    13,991.05/20,986.76 = 4,130.47/x
  3. Step 3: Cross multiply
    13,991.05x = 20,986.76 × 4,130.47
  4. Step 4: Simplify right side
    13,991.05x = 86,685,182.58
  5. Step 5: Solve for x
    x = 86,685,182.58/13,991.05
  6. Step 6: Final answer
    x = 6,195.76

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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.