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Finding the Fourth Proportional to 20,655.10, 30,972.97 and 7,505.74

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Solution

The fourth proportional to 20,655.10, 30,972.97 and 7,505.74 is: 11,255.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.10 : 30,972.97 = 7,505.74 : x
  2. Step 2: Convert to fraction form
    20,655.10/30,972.97 = 7,505.74/x
  3. Step 3: Cross multiply
    20,655.10x = 30,972.97 × 7,505.74
  4. Step 4: Simplify right side
    20,655.10x = 232,475,059.85
  5. Step 5: Solve for x
    x = 232,475,059.85/20,655.10
  6. Step 6: Final answer
    x = 11,255.09

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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.