Home / 28,390.52-39,178.41-15,815

Finding the Fourth Proportional to 28,390.52, 39,178.41 and 15,815

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Solution

The fourth proportional to 28,390.52, 39,178.41 and 15,815 is: 21,824.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.52 : 39,178.41 = 15,815 : x
  2. Step 2: Convert to fraction form
    28,390.52/39,178.41 = 15,815/x
  3. Step 3: Cross multiply
    28,390.52x = 39,178.41 × 15,815
  4. Step 4: Simplify right side
    28,390.52x = 619,606,554.15
  5. Step 5: Solve for x
    x = 619,606,554.15/28,390.52
  6. Step 6: Final answer
    x = 21,824.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.