Home / 5,159.12-7,119.90-2,921.22

Finding the Fourth Proportional to 5,159.12, 7,119.90 and 2,921.22

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Solution

The fourth proportional to 5,159.12, 7,119.90 and 2,921.22 is: 4,031.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.12 : 7,119.90 = 2,921.22 : x
  2. Step 2: Convert to fraction form
    5,159.12/7,119.90 = 2,921.22/x
  3. Step 3: Cross multiply
    5,159.12x = 7,119.90 × 2,921.22
  4. Step 4: Simplify right side
    5,159.12x = 20,798,794.28
  5. Step 5: Solve for x
    x = 20,798,794.28/5,159.12
  6. Step 6: Final answer
    x = 4,031.47

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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.