Home / 20,956.22-31,439.22-9,272.78

Finding the Fourth Proportional to 20,956.22, 31,439.22 and 9,272.78

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Solution

The fourth proportional to 20,956.22, 31,439.22 and 9,272.78 is: 13,911.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.22 : 31,439.22 = 9,272.78 : x
  2. Step 2: Convert to fraction form
    20,956.22/31,439.22 = 9,272.78/x
  3. Step 3: Cross multiply
    20,956.22x = 31,439.22 × 9,272.78
  4. Step 4: Simplify right side
    20,956.22x = 291,528,970.43
  5. Step 5: Solve for x
    x = 291,528,970.43/20,956.22
  6. Step 6: Final answer
    x = 13,911.33

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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.