Home / 7,638.38-11,457.45-2,091.72

Finding the Fourth Proportional to 7,638.38, 11,457.45 and 2,091.72

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Solution

The fourth proportional to 7,638.38, 11,457.45 and 2,091.72 is: 3,137.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,638.38 : 11,457.45 = 2,091.72 : x
  2. Step 2: Convert to fraction form
    7,638.38/11,457.45 = 2,091.72/x
  3. Step 3: Cross multiply
    7,638.38x = 11,457.45 × 2,091.72
  4. Step 4: Simplify right side
    7,638.38x = 23,965,777.31
  5. Step 5: Solve for x
    x = 23,965,777.31/7,638.38
  6. Step 6: Final answer
    x = 3,137.55

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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.