Home / 20,361.62-28,098.45-11,978.58

Finding the Fourth Proportional to 20,361.62, 28,098.45 and 11,978.58

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Solution

The fourth proportional to 20,361.62, 28,098.45 and 11,978.58 is: 16,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.62 : 28,098.45 = 11,978.58 : x
  2. Step 2: Convert to fraction form
    20,361.62/28,098.45 = 11,978.58/x
  3. Step 3: Cross multiply
    20,361.62x = 28,098.45 × 11,978.58
  4. Step 4: Simplify right side
    20,361.62x = 336,579,531.20
  5. Step 5: Solve for x
    x = 336,579,531.20/20,361.62
  6. Step 6: Final answer
    x = 16,530.10

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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.