Home / 20,724.24-31,100.40-7,577.40

Finding the Fourth Proportional to 20,724.24, 31,100.40 and 7,577.40

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Solution

The fourth proportional to 20,724.24, 31,100.40 and 7,577.40 is: 11,371.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.24 : 31,100.40 = 7,577.40 : x
  2. Step 2: Convert to fraction form
    20,724.24/31,100.40 = 7,577.40/x
  3. Step 3: Cross multiply
    20,724.24x = 31,100.40 × 7,577.40
  4. Step 4: Simplify right side
    20,724.24x = 235,660,170.96
  5. Step 5: Solve for x
    x = 235,660,170.96/20,724.24
  6. Step 6: Final answer
    x = 11,371.23

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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.