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Finding the Fourth Proportional to 18,279.32, 27,419.04 and 4,428.32

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Solution

The fourth proportional to 18,279.32, 27,419.04 and 4,428.32 is: 6,642.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279.32 : 27,419.04 = 4,428.32 : x
  2. Step 2: Convert to fraction form
    18,279.32/27,419.04 = 4,428.32/x
  3. Step 3: Cross multiply
    18,279.32x = 27,419.04 × 4,428.32
  4. Step 4: Simplify right side
    18,279.32x = 121,420,283.21
  5. Step 5: Solve for x
    x = 121,420,283.21/18,279.32
  6. Step 6: Final answer
    x = 6,642.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.