Home / 13,890.20-20,835.30-3,501.95

Finding the Fourth Proportional to 13,890.20, 20,835.30 and 3,501.95

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Solution

The fourth proportional to 13,890.20, 20,835.30 and 3,501.95 is: 5,252.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.20 : 20,835.30 = 3,501.95 : x
  2. Step 2: Convert to fraction form
    13,890.20/20,835.30 = 3,501.95/x
  3. Step 3: Cross multiply
    13,890.20x = 20,835.30 × 3,501.95
  4. Step 4: Simplify right side
    13,890.20x = 72,964,074.66
  5. Step 5: Solve for x
    x = 72,964,074.66/13,890.20
  6. Step 6: Final answer
    x = 5,252.92

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Similar ratio
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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.