Home / 20,724.84-31,078.11-7,577.31

Finding the Fourth Proportional to 20,724.84, 31,078.11 and 7,577.31

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Solution

The fourth proportional to 20,724.84, 31,078.11 and 7,577.31 is: 11,362.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.84 : 31,078.11 = 7,577.31 : x
  2. Step 2: Convert to fraction form
    20,724.84/31,078.11 = 7,577.31/x
  3. Step 3: Cross multiply
    20,724.84x = 31,078.11 × 7,577.31
  4. Step 4: Simplify right side
    20,724.84x = 235,488,473.68
  5. Step 5: Solve for x
    x = 235,488,473.68/20,724.84
  6. Step 6: Final answer
    x = 11,362.62

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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.