Home / 3,970.32-5,479.08-2,177.85

Finding the Fourth Proportional to 3,970.32, 5,479.08 and 2,177.85

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Solution

The fourth proportional to 3,970.32, 5,479.08 and 2,177.85 is: 3,005.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.32 : 5,479.08 = 2,177.85 : x
  2. Step 2: Convert to fraction form
    3,970.32/5,479.08 = 2,177.85/x
  3. Step 3: Cross multiply
    3,970.32x = 5,479.08 × 2,177.85
  4. Step 4: Simplify right side
    3,970.32x = 11,932,614.38
  5. Step 5: Solve for x
    x = 11,932,614.38/3,970.32
  6. Step 6: Final answer
    x = 3,005.45

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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.