Home / 13,990.80-20,986.38-4,130.22

Finding the Fourth Proportional to 13,990.80, 20,986.38 and 4,130.22

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Solution

The fourth proportional to 13,990.80, 20,986.38 and 4,130.22 is: 6,195.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.80 : 20,986.38 = 4,130.22 : x
  2. Step 2: Convert to fraction form
    13,990.80/20,986.38 = 4,130.22/x
  3. Step 3: Cross multiply
    13,990.80x = 20,986.38 × 4,130.22
  4. Step 4: Simplify right side
    13,990.80x = 86,678,366.40
  5. Step 5: Solve for x
    x = 86,678,366.40/13,990.80
  6. Step 6: Final answer
    x = 6,195.38

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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.