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Finding the Fourth Proportional to 20,104.70, 30,185.85 and 11,356.70

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Solution

The fourth proportional to 20,104.70, 30,185.85 and 11,356.70 is: 17,051.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,104.70 : 30,185.85 = 11,356.70 : x
  2. Step 2: Convert to fraction form
    20,104.70/30,185.85 = 11,356.70/x
  3. Step 3: Cross multiply
    20,104.70x = 30,185.85 × 11,356.70
  4. Step 4: Simplify right side
    20,104.70x = 342,811,642.70
  5. Step 5: Solve for x
    x = 342,811,642.70/20,104.70
  6. Step 6: Final answer
    x = 17,051.32

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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.