Home / 18,961.05-28,429.43-7,875.39

Finding the Fourth Proportional to 18,961.05, 28,429.43 and 7,875.39

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Solution

The fourth proportional to 18,961.05, 28,429.43 and 7,875.39 is: 11,808.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.05 : 28,429.43 = 7,875.39 : x
  2. Step 2: Convert to fraction form
    18,961.05/28,429.43 = 7,875.39/x
  3. Step 3: Cross multiply
    18,961.05x = 28,429.43 × 7,875.39
  4. Step 4: Simplify right side
    18,961.05x = 223,892,960.26
  5. Step 5: Solve for x
    x = 223,892,960.26/18,961.05
  6. Step 6: Final answer
    x = 11,808.04

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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.