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Finding the Fourth Proportional to 20,602.70, 30,890.40 and 7,453.36

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Solution

The fourth proportional to 20,602.70, 30,890.40 and 7,453.36 is: 11,175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.70 : 30,890.40 = 7,453.36 : x
  2. Step 2: Convert to fraction form
    20,602.70/30,890.40 = 7,453.36/x
  3. Step 3: Cross multiply
    20,602.70x = 30,890.40 × 7,453.36
  4. Step 4: Simplify right side
    20,602.70x = 230,237,234.48
  5. Step 5: Solve for x
    x = 230,237,234.48/20,602.70
  6. Step 6: Final answer
    x = 11,175.10

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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.