Home / 7,211.63-10,820.69-3,919.79

Finding the Fourth Proportional to 7,211.63, 10,820.69 and 3,919.79

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Solution

The fourth proportional to 7,211.63, 10,820.69 and 3,919.79 is: 5,881.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,211.63 : 10,820.69 = 3,919.79 : x
  2. Step 2: Convert to fraction form
    7,211.63/10,820.69 = 3,919.79/x
  3. Step 3: Cross multiply
    7,211.63x = 10,820.69 × 3,919.79
  4. Step 4: Simplify right side
    7,211.63x = 42,414,854.61
  5. Step 5: Solve for x
    x = 42,414,854.61/7,211.63
  6. Step 6: Final answer
    x = 5,881.45

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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.