Home / 11,311.92-16,970.40-3,520.80

Finding the Fourth Proportional to 11,311.92, 16,970.40 and 3,520.80

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Solution

The fourth proportional to 11,311.92, 16,970.40 and 3,520.80 is: 5,281.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,311.92 : 16,970.40 = 3,520.80 : x
  2. Step 2: Convert to fraction form
    11,311.92/16,970.40 = 3,520.80/x
  3. Step 3: Cross multiply
    11,311.92x = 16,970.40 × 3,520.80
  4. Step 4: Simplify right side
    11,311.92x = 59,749,384.32
  5. Step 5: Solve for x
    x = 59,749,384.32/11,311.92
  6. Step 6: Final answer
    x = 5,281.98

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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.