Home / 18,905.63-28,363.14-7,815.51

Finding the Fourth Proportional to 18,905.63, 28,363.14 and 7,815.51

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Solution

The fourth proportional to 18,905.63, 28,363.14 and 7,815.51 is: 11,725.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.63 : 28,363.14 = 7,815.51 : x
  2. Step 2: Convert to fraction form
    18,905.63/28,363.14 = 7,815.51/x
  3. Step 3: Cross multiply
    18,905.63x = 28,363.14 × 7,815.51
  4. Step 4: Simplify right side
    18,905.63x = 221,672,404.30
  5. Step 5: Solve for x
    x = 221,672,404.30/18,905.63
  6. Step 6: Final answer
    x = 11,725.21

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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.