Home / 3,686.84-5,529.12-1,221.15

Finding the Fourth Proportional to 3,686.84, 5,529.12 and 1,221.15

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Solution

The fourth proportional to 3,686.84, 5,529.12 and 1,221.15 is: 1,831.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,686.84 : 5,529.12 = 1,221.15 : x
  2. Step 2: Convert to fraction form
    3,686.84/5,529.12 = 1,221.15/x
  3. Step 3: Cross multiply
    3,686.84x = 5,529.12 × 1,221.15
  4. Step 4: Simplify right side
    3,686.84x = 6,751,884.89
  5. Step 5: Solve for x
    x = 6,751,884.89/3,686.84
  6. Step 6: Final answer
    x = 1,831.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.