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Finding the Fourth Proportional to 5,518.38, 7,615.38 and 3,000.51

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Solution

The fourth proportional to 5,518.38, 7,615.38 and 3,000.51 is: 4,140.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.38 : 7,615.38 = 3,000.51 : x
  2. Step 2: Convert to fraction form
    5,518.38/7,615.38 = 3,000.51/x
  3. Step 3: Cross multiply
    5,518.38x = 7,615.38 × 3,000.51
  4. Step 4: Simplify right side
    5,518.38x = 22,850,023.84
  5. Step 5: Solve for x
    x = 22,850,023.84/5,518.38
  6. Step 6: Final answer
    x = 4,140.71

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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.