Home / 20,980.62-28,932.76-13,424.20

Finding the Fourth Proportional to 20,980.62, 28,932.76 and 13,424.20

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Solution

The fourth proportional to 20,980.62, 28,932.76 and 13,424.20 is: 18,512.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.62 : 28,932.76 = 13,424.20 : x
  2. Step 2: Convert to fraction form
    20,980.62/28,932.76 = 13,424.20/x
  3. Step 3: Cross multiply
    20,980.62x = 28,932.76 × 13,424.20
  4. Step 4: Simplify right side
    20,980.62x = 388,399,101.24
  5. Step 5: Solve for x
    x = 388,399,101.24/20,980.62
  6. Step 6: Final answer
    x = 18,512.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.