Home / 3,970.74-5,479.32-2,177.93

Finding the Fourth Proportional to 3,970.74, 5,479.32 and 2,177.93

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Solution

The fourth proportional to 3,970.74, 5,479.32 and 2,177.93 is: 3,005.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.74 : 5,479.32 = 2,177.93 : x
  2. Step 2: Convert to fraction form
    3,970.74/5,479.32 = 2,177.93/x
  3. Step 3: Cross multiply
    3,970.74x = 5,479.32 × 2,177.93
  4. Step 4: Simplify right side
    3,970.74x = 11,933,548.01
  5. Step 5: Solve for x
    x = 11,933,548.01/3,970.74
  6. Step 6: Final answer
    x = 3,005.37

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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.