Home / 18,905.38-28,362.75-7,815.26

Finding the Fourth Proportional to 18,905.38, 28,362.75 and 7,815.26

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Solution

The fourth proportional to 18,905.38, 28,362.75 and 7,815.26 is: 11,724.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.38 : 28,362.75 = 7,815.26 : x
  2. Step 2: Convert to fraction form
    18,905.38/28,362.75 = 7,815.26/x
  3. Step 3: Cross multiply
    18,905.38x = 28,362.75 × 7,815.26
  4. Step 4: Simplify right side
    18,905.38x = 221,662,265.57
  5. Step 5: Solve for x
    x = 221,662,265.57/18,905.38
  6. Step 6: Final answer
    x = 11,724.82

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1.5x scale

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.