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Finding the Fourth Proportional to 6,615.56, 9,129.49 and 3,821.06

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Solution

The fourth proportional to 6,615.56, 9,129.49 and 3,821.06 is: 5,273.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.56 : 9,129.49 = 3,821.06 : x
  2. Step 2: Convert to fraction form
    6,615.56/9,129.49 = 3,821.06/x
  3. Step 3: Cross multiply
    6,615.56x = 9,129.49 × 3,821.06
  4. Step 4: Simplify right side
    6,615.56x = 34,884,342.33
  5. Step 5: Solve for x
    x = 34,884,342.33/6,615.56
  6. Step 6: Final answer
    x = 5,273.07

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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.