Home / 3,976.32-5,490-3,555.36

Finding the Fourth Proportional to 3,976.32, 5,490 and 3,555.36

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Solution

The fourth proportional to 3,976.32, 5,490 and 3,555.36 is: 4,908.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,976.32 : 5,490 = 3,555.36 : x
  2. Step 2: Convert to fraction form
    3,976.32/5,490 = 3,555.36/x
  3. Step 3: Cross multiply
    3,976.32x = 5,490 × 3,555.36
  4. Step 4: Simplify right side
    3,976.32x = 19,518,926.40
  5. Step 5: Solve for x
    x = 19,518,926.40/3,976.32
  6. Step 6: Final answer
    x = 4,908.79

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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.