Home / 13,865.30-20,785.80-8,320.85

Finding the Fourth Proportional to 13,865.30, 20,785.80 and 8,320.85

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Solution

The fourth proportional to 13,865.30, 20,785.80 and 8,320.85 is: 12,473.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,865.30 : 20,785.80 = 8,320.85 : x
  2. Step 2: Convert to fraction form
    13,865.30/20,785.80 = 8,320.85/x
  3. Step 3: Cross multiply
    13,865.30x = 20,785.80 × 8,320.85
  4. Step 4: Simplify right side
    13,865.30x = 172,955,523.93
  5. Step 5: Solve for x
    x = 172,955,523.93/13,865.30
  6. Step 6: Final answer
    x = 12,473.98

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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.