Home / 5,159.59-7,120.40-2,921.43

Finding the Fourth Proportional to 5,159.59, 7,120.40 and 2,921.43

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Solution

The fourth proportional to 5,159.59, 7,120.40 and 2,921.43 is: 4,031.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.59 : 7,120.40 = 2,921.43 : x
  2. Step 2: Convert to fraction form
    5,159.59/7,120.40 = 2,921.43/x
  3. Step 3: Cross multiply
    5,159.59x = 7,120.40 × 2,921.43
  4. Step 4: Simplify right side
    5,159.59x = 20,801,699.96
  5. Step 5: Solve for x
    x = 20,801,699.96/5,159.59
  6. Step 6: Final answer
    x = 4,031.66

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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.