Home / 18,478.40-27,721.70-5,329.75

Finding the Fourth Proportional to 18,478.40, 27,721.70 and 5,329.75

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Solution

The fourth proportional to 18,478.40, 27,721.70 and 5,329.75 is: 7,995.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.40 : 27,721.70 = 5,329.75 : x
  2. Step 2: Convert to fraction form
    18,478.40/27,721.70 = 5,329.75/x
  3. Step 3: Cross multiply
    18,478.40x = 27,721.70 × 5,329.75
  4. Step 4: Simplify right side
    18,478.40x = 147,749,730.58
  5. Step 5: Solve for x
    x = 147,749,730.58/18,478.40
  6. Step 6: Final answer
    x = 7,995.81

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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.