Home / 5,159.89-7,120.47-2,801.98

Finding the Fourth Proportional to 5,159.89, 7,120.47 and 2,801.98

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Solution

The fourth proportional to 5,159.89, 7,120.47 and 2,801.98 is: 3,866.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.89 : 7,120.47 = 2,801.98 : x
  2. Step 2: Convert to fraction form
    5,159.89/7,120.47 = 2,801.98/x
  3. Step 3: Cross multiply
    5,159.89x = 7,120.47 × 2,801.98
  4. Step 4: Simplify right side
    5,159.89x = 19,951,414.53
  5. Step 5: Solve for x
    x = 19,951,414.53/5,159.89
  6. Step 6: Final answer
    x = 3,866.64

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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.