Home / 7,120.47-9,826.40-3,976.66

Finding the Fourth Proportional to 7,120.47, 9,826.40 and 3,976.66

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Solution

The fourth proportional to 7,120.47, 9,826.40 and 3,976.66 is: 5,487.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.47 : 9,826.40 = 3,976.66 : x
  2. Step 2: Convert to fraction form
    7,120.47/9,826.40 = 3,976.66/x
  3. Step 3: Cross multiply
    7,120.47x = 9,826.40 × 3,976.66
  4. Step 4: Simplify right side
    7,120.47x = 39,076,251.82
  5. Step 5: Solve for x
    x = 39,076,251.82/7,120.47
  6. Step 6: Final answer
    x = 5,487.88

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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.