Home / 15,761.92-21,752.43-8,688.33

Finding the Fourth Proportional to 15,761.92, 21,752.43 and 8,688.33

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Solution

The fourth proportional to 15,761.92, 21,752.43 and 8,688.33 is: 11,990.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.92 : 21,752.43 = 8,688.33 : x
  2. Step 2: Convert to fraction form
    15,761.92/21,752.43 = 8,688.33/x
  3. Step 3: Cross multiply
    15,761.92x = 21,752.43 × 8,688.33
  4. Step 4: Simplify right side
    15,761.92x = 188,992,290.14
  5. Step 5: Solve for x
    x = 188,992,290.14/15,761.92
  6. Step 6: Final answer
    x = 11,990.44

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1.5x scale

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.