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Finding the Fourth Proportional to 20,575.20, 30,844.32 and 7,424.48

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Solution

The fourth proportional to 20,575.20, 30,844.32 and 7,424.48 is: 11,130.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,575.20 : 30,844.32 = 7,424.48 : x
  2. Step 2: Convert to fraction form
    20,575.20/30,844.32 = 7,424.48/x
  3. Step 3: Cross multiply
    20,575.20x = 30,844.32 × 7,424.48
  4. Step 4: Simplify right side
    20,575.20x = 229,003,036.95
  5. Step 5: Solve for x
    x = 229,003,036.95/20,575.20
  6. Step 6: Final answer
    x = 11,130.05

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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.