Home / 5,159.71-7,120.40-2,801.89

Finding the Fourth Proportional to 5,159.71, 7,120.40 and 2,801.89

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Solution

The fourth proportional to 5,159.71, 7,120.40 and 2,801.89 is: 3,866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.71 : 7,120.40 = 2,801.89 : x
  2. Step 2: Convert to fraction form
    5,159.71/7,120.40 = 2,801.89/x
  3. Step 3: Cross multiply
    5,159.71x = 7,120.40 × 2,801.89
  4. Step 4: Simplify right side
    5,159.71x = 19,950,577.56
  5. Step 5: Solve for x
    x = 19,950,577.56/5,159.71
  6. Step 6: Final answer
    x = 3,866.61

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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.