Home / 5,159.48-7,121.12-2,921.36

Finding the Fourth Proportional to 5,159.48, 7,121.12 and 2,921.36

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Solution

The fourth proportional to 5,159.48, 7,121.12 and 2,921.36 is: 4,032.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.48 : 7,121.12 = 2,921.36 : x
  2. Step 2: Convert to fraction form
    5,159.48/7,121.12 = 2,921.36/x
  3. Step 3: Cross multiply
    5,159.48x = 7,121.12 × 2,921.36
  4. Step 4: Simplify right side
    5,159.48x = 20,803,355.12
  5. Step 5: Solve for x
    x = 20,803,355.12/5,159.48
  6. Step 6: Final answer
    x = 4,032.06

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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.