Home / 20,921.98-31,380.24-9,232.47

Finding the Fourth Proportional to 20,921.98, 31,380.24 and 9,232.47

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Solution

The fourth proportional to 20,921.98, 31,380.24 and 9,232.47 is: 13,847.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.98 : 31,380.24 = 9,232.47 : x
  2. Step 2: Convert to fraction form
    20,921.98/31,380.24 = 9,232.47/x
  3. Step 3: Cross multiply
    20,921.98x = 31,380.24 × 9,232.47
  4. Step 4: Simplify right side
    20,921.98x = 289,717,124.39
  5. Step 5: Solve for x
    x = 289,717,124.39/20,921.98
  6. Step 6: Final answer
    x = 13,847.50

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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.