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Finding the Fourth Proportional to 20,135.99, 30,203.99 and 5,345.52

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Solution

The fourth proportional to 20,135.99, 30,203.99 and 5,345.52 is: 8,018.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.99 : 30,203.99 = 5,345.52 : x
  2. Step 2: Convert to fraction form
    20,135.99/30,203.99 = 5,345.52/x
  3. Step 3: Cross multiply
    20,135.99x = 30,203.99 × 5,345.52
  4. Step 4: Simplify right side
    20,135.99x = 161,456,032.62
  5. Step 5: Solve for x
    x = 161,456,032.62/20,135.99
  6. Step 6: Final answer
    x = 8,018.28

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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.