Home / 3,869.47-5,339.75-2,190.86

Finding the Fourth Proportional to 3,869.47, 5,339.75 and 2,190.86

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Solution

The fourth proportional to 3,869.47, 5,339.75 and 2,190.86 is: 3,023.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.47 : 5,339.75 = 2,190.86 : x
  2. Step 2: Convert to fraction form
    3,869.47/5,339.75 = 2,190.86/x
  3. Step 3: Cross multiply
    3,869.47x = 5,339.75 × 2,190.86
  4. Step 4: Simplify right side
    3,869.47x = 11,698,663.51
  5. Step 5: Solve for x
    x = 11,698,663.51/3,869.47
  6. Step 6: Final answer
    x = 3,023.33

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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.