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Finding the Fourth Proportional to 20,267.71, 30,401.53 and 11,267.55

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Solution

The fourth proportional to 20,267.71, 30,401.53 and 11,267.55 is: 16,901.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,267.71 : 30,401.53 = 11,267.55 : x
  2. Step 2: Convert to fraction form
    20,267.71/30,401.53 = 11,267.55/x
  3. Step 3: Cross multiply
    20,267.71x = 30,401.53 × 11,267.55
  4. Step 4: Simplify right side
    20,267.71x = 342,550,731.18
  5. Step 5: Solve for x
    x = 342,550,731.18/20,267.71
  6. Step 6: Final answer
    x = 16,901.31

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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.