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Finding the Fourth Proportional to 20,267.80, 30,401.70 and 13,269.40

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Solution

The fourth proportional to 20,267.80, 30,401.70 and 13,269.40 is: 19,904.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,267.80 : 30,401.70 = 13,269.40 : x
  2. Step 2: Convert to fraction form
    20,267.80/30,401.70 = 13,269.40/x
  3. Step 3: Cross multiply
    20,267.80x = 30,401.70 × 13,269.40
  4. Step 4: Simplify right side
    20,267.80x = 403,412,317.98
  5. Step 5: Solve for x
    x = 403,412,317.98/20,267.80
  6. Step 6: Final answer
    x = 19,904.10

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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.