Home / 3,911.04-5,397.20-2,118.47

Finding the Fourth Proportional to 3,911.04, 5,397.20 and 2,118.47

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Solution

The fourth proportional to 3,911.04, 5,397.20 and 2,118.47 is: 2,923.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.04 : 5,397.20 = 2,118.47 : x
  2. Step 2: Convert to fraction form
    3,911.04/5,397.20 = 2,118.47/x
  3. Step 3: Cross multiply
    3,911.04x = 5,397.20 × 2,118.47
  4. Step 4: Simplify right side
    3,911.04x = 11,433,831.76
  5. Step 5: Solve for x
    x = 11,433,831.76/3,911.04
  6. Step 6: Final answer
    x = 2,923.48

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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.