Home / 13,811.28-20,700.72-5,911.50

Finding the Fourth Proportional to 13,811.28, 20,700.72 and 5,911.50

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Solution

The fourth proportional to 13,811.28, 20,700.72 and 5,911.50 is: 8,860.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.28 : 20,700.72 = 5,911.50 : x
  2. Step 2: Convert to fraction form
    13,811.28/20,700.72 = 5,911.50/x
  3. Step 3: Cross multiply
    13,811.28x = 20,700.72 × 5,911.50
  4. Step 4: Simplify right side
    13,811.28x = 122,372,306.28
  5. Step 5: Solve for x
    x = 122,372,306.28/13,811.28
  6. Step 6: Final answer
    x = 8,860.32

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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.