Home / 13,909.24-20,863.86-3,520.72

Finding the Fourth Proportional to 13,909.24, 20,863.86 and 3,520.72

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Solution

The fourth proportional to 13,909.24, 20,863.86 and 3,520.72 is: 5,281.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.24 : 20,863.86 = 3,520.72 : x
  2. Step 2: Convert to fraction form
    13,909.24/20,863.86 = 3,520.72/x
  3. Step 3: Cross multiply
    13,909.24x = 20,863.86 × 3,520.72
  4. Step 4: Simplify right side
    13,909.24x = 73,455,809.18
  5. Step 5: Solve for x
    x = 73,455,809.18/13,909.24
  6. Step 6: Final answer
    x = 5,281.08

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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.