Home / 13,708.72-20,563.20-3,320.56

Finding the Fourth Proportional to 13,708.72, 20,563.20 and 3,320.56

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Solution

The fourth proportional to 13,708.72, 20,563.20 and 3,320.56 is: 4,980.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.72 : 20,563.20 = 3,320.56 : x
  2. Step 2: Convert to fraction form
    13,708.72/20,563.20 = 3,320.56/x
  3. Step 3: Cross multiply
    13,708.72x = 20,563.20 × 3,320.56
  4. Step 4: Simplify right side
    13,708.72x = 68,281,339.39
  5. Step 5: Solve for x
    x = 68,281,339.39/13,708.72
  6. Step 6: Final answer
    x = 4,980.87

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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.