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Finding the Fourth Proportional to 13,379.68, 20,069.52 and 4,020.70

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Solution

The fourth proportional to 13,379.68, 20,069.52 and 4,020.70 is: 6,031.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.68 : 20,069.52 = 4,020.70 : x
  2. Step 2: Convert to fraction form
    13,379.68/20,069.52 = 4,020.70/x
  3. Step 3: Cross multiply
    13,379.68x = 20,069.52 × 4,020.70
  4. Step 4: Simplify right side
    13,379.68x = 80,693,519.06
  5. Step 5: Solve for x
    x = 80,693,519.06/13,379.68
  6. Step 6: Final answer
    x = 6,031.05

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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.