Home / 20,388.31-30,574.26-7,901.75

Finding the Fourth Proportional to 20,388.31, 30,574.26 and 7,901.75

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Solution

The fourth proportional to 20,388.31, 30,574.26 and 7,901.75 is: 11,849.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.31 : 30,574.26 = 7,901.75 : x
  2. Step 2: Convert to fraction form
    20,388.31/30,574.26 = 7,901.75/x
  3. Step 3: Cross multiply
    20,388.31x = 30,574.26 × 7,901.75
  4. Step 4: Simplify right side
    20,388.31x = 241,590,235.39
  5. Step 5: Solve for x
    x = 241,590,235.39/20,388.31
  6. Step 6: Final answer
    x = 11,849.45

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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.