Home / 20,690.76-28,533.39-13,900.14

Finding the Fourth Proportional to 20,690.76, 28,533.39 and 13,900.14

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Solution

The fourth proportional to 20,690.76, 28,533.39 and 13,900.14 is: 19,168.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.76 : 28,533.39 = 13,900.14 : x
  2. Step 2: Convert to fraction form
    20,690.76/28,533.39 = 13,900.14/x
  3. Step 3: Cross multiply
    20,690.76x = 28,533.39 × 13,900.14
  4. Step 4: Simplify right side
    20,690.76x = 396,618,115.67
  5. Step 5: Solve for x
    x = 396,618,115.67/20,690.76
  6. Step 6: Final answer
    x = 19,168.85

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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.