Home / 5,159.64-7,120.30-2,801.78

Finding the Fourth Proportional to 5,159.64, 7,120.30 and 2,801.78

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Solution

The fourth proportional to 5,159.64, 7,120.30 and 2,801.78 is: 3,866.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.64 : 7,120.30 = 2,801.78 : x
  2. Step 2: Convert to fraction form
    5,159.64/7,120.30 = 2,801.78/x
  3. Step 3: Cross multiply
    5,159.64x = 7,120.30 × 2,801.78
  4. Step 4: Simplify right side
    5,159.64x = 19,949,491.50
  5. Step 5: Solve for x
    x = 19,949,491.50/5,159.64
  6. Step 6: Final answer
    x = 3,866.45

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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.