Home / 20,922.48-28,863.27-12,961.80

Finding the Fourth Proportional to 20,922.48, 28,863.27 and 12,961.80

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Solution

The fourth proportional to 20,922.48, 28,863.27 and 12,961.80 is: 17,881.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.48 : 28,863.27 = 12,961.80 : x
  2. Step 2: Convert to fraction form
    20,922.48/28,863.27 = 12,961.80/x
  3. Step 3: Cross multiply
    20,922.48x = 28,863.27 × 12,961.80
  4. Step 4: Simplify right side
    20,922.48x = 374,119,933.09
  5. Step 5: Solve for x
    x = 374,119,933.09/20,922.48
  6. Step 6: Final answer
    x = 17,881.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.