Home / 3,927.64-5,409-3,915.48

Finding the Fourth Proportional to 3,927.64, 5,409 and 3,915.48

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Solution

The fourth proportional to 3,927.64, 5,409 and 3,915.48 is: 5,392.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.64 : 5,409 = 3,915.48 : x
  2. Step 2: Convert to fraction form
    3,927.64/5,409 = 3,915.48/x
  3. Step 3: Cross multiply
    3,927.64x = 5,409 × 3,915.48
  4. Step 4: Simplify right side
    3,927.64x = 21,178,831.32
  5. Step 5: Solve for x
    x = 21,178,831.32/3,927.64
  6. Step 6: Final answer
    x = 5,392.25

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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.