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Finding the Fourth Proportional to 6,889.47, 9,507.27 and 3,905.58

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Solution

The fourth proportional to 6,889.47, 9,507.27 and 3,905.58 is: 5,389.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,889.47 : 9,507.27 = 3,905.58 : x
  2. Step 2: Convert to fraction form
    6,889.47/9,507.27 = 3,905.58/x
  3. Step 3: Cross multiply
    6,889.47x = 9,507.27 × 3,905.58
  4. Step 4: Simplify right side
    6,889.47x = 37,131,403.57
  5. Step 5: Solve for x
    x = 37,131,403.57/6,889.47
  6. Step 6: Final answer
    x = 5,389.59

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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.