Home / 13,347.16-20,021.72-3,986.44

Finding the Fourth Proportional to 13,347.16, 20,021.72 and 3,986.44

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Solution

The fourth proportional to 13,347.16, 20,021.72 and 3,986.44 is: 5,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.16 : 20,021.72 = 3,986.44 : x
  2. Step 2: Convert to fraction form
    13,347.16/20,021.72 = 3,986.44/x
  3. Step 3: Cross multiply
    13,347.16x = 20,021.72 × 3,986.44
  4. Step 4: Simplify right side
    13,347.16x = 79,815,385.48
  5. Step 5: Solve for x
    x = 79,815,385.48/13,347.16
  6. Step 6: Final answer
    x = 5,979.95

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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.