Home / 3,927.42-5,419.82-2,159.12

Finding the Fourth Proportional to 3,927.42, 5,419.82 and 2,159.12

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Solution

The fourth proportional to 3,927.42, 5,419.82 and 2,159.12 is: 2,979.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.42 : 5,419.82 = 2,159.12 : x
  2. Step 2: Convert to fraction form
    3,927.42/5,419.82 = 2,159.12/x
  3. Step 3: Cross multiply
    3,927.42x = 5,419.82 × 2,159.12
  4. Step 4: Simplify right side
    3,927.42x = 11,702,041.76
  5. Step 5: Solve for x
    x = 11,702,041.76/3,927.42
  6. Step 6: Final answer
    x = 2,979.57

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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.