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Finding the Fourth Proportional to 18,956.53, 28,435.48 and 7,109.10

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Solution

The fourth proportional to 18,956.53, 28,435.48 and 7,109.10 is: 10,663.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.53 : 28,435.48 = 7,109.10 : x
  2. Step 2: Convert to fraction form
    18,956.53/28,435.48 = 7,109.10/x
  3. Step 3: Cross multiply
    18,956.53x = 28,435.48 × 7,109.10
  4. Step 4: Simplify right side
    18,956.53x = 202,150,673.09
  5. Step 5: Solve for x
    x = 202,150,673.09/18,956.53
  6. Step 6: Final answer
    x = 10,663.91

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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.