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Finding the Fourth Proportional to 20,553.53, 30,830.30 and 4,971.16

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Solution

The fourth proportional to 20,553.53, 30,830.30 and 4,971.16 is: 7,456.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.53 : 30,830.30 = 4,971.16 : x
  2. Step 2: Convert to fraction form
    20,553.53/30,830.30 = 4,971.16/x
  3. Step 3: Cross multiply
    20,553.53x = 30,830.30 × 4,971.16
  4. Step 4: Simplify right side
    20,553.53x = 153,262,175.14
  5. Step 5: Solve for x
    x = 153,262,175.14/20,553.53
  6. Step 6: Final answer
    x = 7,456.73

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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.