Home / 20,922.66-28,862.56-13,361.04

Finding the Fourth Proportional to 20,922.66, 28,862.56 and 13,361.04

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Solution

The fourth proportional to 20,922.66, 28,862.56 and 13,361.04 is: 18,431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.66 : 28,862.56 = 13,361.04 : x
  2. Step 2: Convert to fraction form
    20,922.66/28,862.56 = 13,361.04/x
  3. Step 3: Cross multiply
    20,922.66x = 28,862.56 × 13,361.04
  4. Step 4: Simplify right side
    20,922.66x = 385,633,818.66
  5. Step 5: Solve for x
    x = 385,633,818.66/20,922.66
  6. Step 6: Final answer
    x = 18,431.40

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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.