Home / 5,159.92-7,120.56-2,921.76

Finding the Fourth Proportional to 5,159.92, 7,120.56 and 2,921.76

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Solution

The fourth proportional to 5,159.92, 7,120.56 and 2,921.76 is: 4,031.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.92 : 7,120.56 = 2,921.76 : x
  2. Step 2: Convert to fraction form
    5,159.92/7,120.56 = 2,921.76/x
  3. Step 3: Cross multiply
    5,159.92x = 7,120.56 × 2,921.76
  4. Step 4: Simplify right side
    5,159.92x = 20,804,567.39
  5. Step 5: Solve for x
    x = 20,804,567.39/5,159.92
  6. Step 6: Final answer
    x = 4,031.96

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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.