Home / 13,311.38-19,970.45-4,991.42

Finding the Fourth Proportional to 13,311.38, 19,970.45 and 4,991.42

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Solution

The fourth proportional to 13,311.38, 19,970.45 and 4,991.42 is: 7,488.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311.38 : 19,970.45 = 4,991.42 : x
  2. Step 2: Convert to fraction form
    13,311.38/19,970.45 = 4,991.42/x
  3. Step 3: Cross multiply
    13,311.38x = 19,970.45 × 4,991.42
  4. Step 4: Simplify right side
    13,311.38x = 99,680,778.73
  5. Step 5: Solve for x
    x = 99,680,778.73/13,311.38
  6. Step 6: Final answer
    x = 7,488.39

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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.