Home / 18,715.29-28,072.86-7,619.36

Finding the Fourth Proportional to 18,715.29, 28,072.86 and 7,619.36

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Solution

The fourth proportional to 18,715.29, 28,072.86 and 7,619.36 is: 11,429.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.29 : 28,072.86 = 7,619.36 : x
  2. Step 2: Convert to fraction form
    18,715.29/28,072.86 = 7,619.36/x
  3. Step 3: Cross multiply
    18,715.29x = 28,072.86 × 7,619.36
  4. Step 4: Simplify right side
    18,715.29x = 213,897,086.21
  5. Step 5: Solve for x
    x = 213,897,086.21/18,715.29
  6. Step 6: Final answer
    x = 11,429.00

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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.