Home / 3,927.85-5,420.39-2,159.48

Finding the Fourth Proportional to 3,927.85, 5,420.39 and 2,159.48

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Solution

The fourth proportional to 3,927.85, 5,420.39 and 2,159.48 is: 2,980.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.85 : 5,420.39 = 2,159.48 : x
  2. Step 2: Convert to fraction form
    3,927.85/5,420.39 = 2,159.48/x
  3. Step 3: Cross multiply
    3,927.85x = 5,420.39 × 2,159.48
  4. Step 4: Simplify right side
    3,927.85x = 11,705,223.80
  5. Step 5: Solve for x
    x = 11,705,223.80/3,927.85
  6. Step 6: Final answer
    x = 2,980.06

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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.