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Finding the Fourth Proportional to 6,920.63, 10,372.74 and 3,992.88

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Solution

The fourth proportional to 6,920.63, 10,372.74 and 3,992.88 is: 5,984.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.63 : 10,372.74 = 3,992.88 : x
  2. Step 2: Convert to fraction form
    6,920.63/10,372.74 = 3,992.88/x
  3. Step 3: Cross multiply
    6,920.63x = 10,372.74 × 3,992.88
  4. Step 4: Simplify right side
    6,920.63x = 41,417,106.09
  5. Step 5: Solve for x
    x = 41,417,106.09/6,920.63
  6. Step 6: Final answer
    x = 5,984.59

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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.