Home / 20,900.88-31,361.52-9,212.64

Finding the Fourth Proportional to 20,900.88, 31,361.52 and 9,212.64

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Solution

The fourth proportional to 20,900.88, 31,361.52 and 9,212.64 is: 13,823.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.88 : 31,361.52 = 9,212.64 : x
  2. Step 2: Convert to fraction form
    20,900.88/31,361.52 = 9,212.64/x
  3. Step 3: Cross multiply
    20,900.88x = 31,361.52 × 9,212.64
  4. Step 4: Simplify right side
    20,900.88x = 288,922,393.61
  5. Step 5: Solve for x
    x = 288,922,393.61/20,900.88
  6. Step 6: Final answer
    x = 13,823.46

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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.