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Finding the Fourth Proportional to 18,279.51, 27,419.22 and 4,428.51

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Solution

The fourth proportional to 18,279.51, 27,419.22 and 4,428.51 is: 6,642.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279.51 : 27,419.22 = 4,428.51 : x
  2. Step 2: Convert to fraction form
    18,279.51/27,419.22 = 4,428.51/x
  3. Step 3: Cross multiply
    18,279.51x = 27,419.22 × 4,428.51
  4. Step 4: Simplify right side
    18,279.51x = 121,426,289.96
  5. Step 5: Solve for x
    x = 121,426,289.96/18,279.51
  6. Step 6: Final answer
    x = 6,642.75

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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.