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Finding the Fourth Proportional to 20,644.77, 30,969.95 and 7,500.90

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Solution

The fourth proportional to 20,644.77, 30,969.95 and 7,500.90 is: 11,252.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.77 : 30,969.95 = 7,500.90 : x
  2. Step 2: Convert to fraction form
    20,644.77/30,969.95 = 7,500.90/x
  3. Step 3: Cross multiply
    20,644.77x = 30,969.95 × 7,500.90
  4. Step 4: Simplify right side
    20,644.77x = 232,302,576.59
  5. Step 5: Solve for x
    x = 232,302,576.59/20,644.77
  6. Step 6: Final answer
    x = 11,252.37

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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.