Home / 20,922.08-28,872.36-11,361.89

Finding the Fourth Proportional to 20,922.08, 28,872.36 and 11,361.89

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Solution

The fourth proportional to 20,922.08, 28,872.36 and 11,361.89 is: 15,679.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.08 : 28,872.36 = 11,361.89 : x
  2. Step 2: Convert to fraction form
    20,922.08/28,872.36 = 11,361.89/x
  3. Step 3: Cross multiply
    20,922.08x = 28,872.36 × 11,361.89
  4. Step 4: Simplify right side
    20,922.08x = 328,044,434.00
  5. Step 5: Solve for x
    x = 328,044,434.00/20,922.08
  6. Step 6: Final answer
    x = 15,679.35

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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.