Home / 20,172.12-27,819.74-13,100.76

Finding the Fourth Proportional to 20,172.12, 27,819.74 and 13,100.76

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Solution

The fourth proportional to 20,172.12, 27,819.74 and 13,100.76 is: 18,067.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.12 : 27,819.74 = 13,100.76 : x
  2. Step 2: Convert to fraction form
    20,172.12/27,819.74 = 13,100.76/x
  3. Step 3: Cross multiply
    20,172.12x = 27,819.74 × 13,100.76
  4. Step 4: Simplify right side
    20,172.12x = 364,459,737.00
  5. Step 5: Solve for x
    x = 364,459,737.00/20,172.12
  6. Step 6: Final answer
    x = 18,067.50

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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.