Home / 20,374.93-28,115.88-11,420.70

Finding the Fourth Proportional to 20,374.93, 28,115.88 and 11,420.70

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Solution

The fourth proportional to 20,374.93, 28,115.88 and 11,420.70 is: 15,759.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.93 : 28,115.88 = 11,420.70 : x
  2. Step 2: Convert to fraction form
    20,374.93/28,115.88 = 11,420.70/x
  3. Step 3: Cross multiply
    20,374.93x = 28,115.88 × 11,420.70
  4. Step 4: Simplify right side
    20,374.93x = 321,102,882.45
  5. Step 5: Solve for x
    x = 321,102,882.45/20,374.93
  6. Step 6: Final answer
    x = 15,759.70

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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.