Home / 5,156.70-7,116.31-2,798.86

Finding the Fourth Proportional to 5,156.70, 7,116.31 and 2,798.86

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Solution

The fourth proportional to 5,156.70, 7,116.31 and 2,798.86 is: 3,862.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.70 : 7,116.31 = 2,798.86 : x
  2. Step 2: Convert to fraction form
    5,156.70/7,116.31 = 2,798.86/x
  3. Step 3: Cross multiply
    5,156.70x = 7,116.31 × 2,798.86
  4. Step 4: Simplify right side
    5,156.70x = 19,917,555.41
  5. Step 5: Solve for x
    x = 19,917,555.41/5,156.70
  6. Step 6: Final answer
    x = 3,862.46

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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.