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Finding the Fourth Proportional to 6,889.77, 9,508.63 and 3,905.29

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Solution

The fourth proportional to 6,889.77, 9,508.63 and 3,905.29 is: 5,389.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,889.77 : 9,508.63 = 3,905.29 : x
  2. Step 2: Convert to fraction form
    6,889.77/9,508.63 = 3,905.29/x
  3. Step 3: Cross multiply
    6,889.77x = 9,508.63 × 3,905.29
  4. Step 4: Simplify right side
    6,889.77x = 37,133,957.65
  5. Step 5: Solve for x
    x = 37,133,957.65/6,889.77
  6. Step 6: Final answer
    x = 5,389.72

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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.