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Finding the Fourth Proportional to 20,340.14, 28,068 and 11,264.84

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Solution

The fourth proportional to 20,340.14, 28,068 and 11,264.84 is: 15,544.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.14 : 28,068 = 11,264.84 : x
  2. Step 2: Convert to fraction form
    20,340.14/28,068 = 11,264.84/x
  3. Step 3: Cross multiply
    20,340.14x = 28,068 × 11,264.84
  4. Step 4: Simplify right side
    20,340.14x = 316,181,529.12
  5. Step 5: Solve for x
    x = 316,181,529.12/20,340.14
  6. Step 6: Final answer
    x = 15,544.71

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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.