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Finding the Fourth Proportional to 8,661.57, 12,980.37 and 4,955.97

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Solution

The fourth proportional to 8,661.57, 12,980.37 and 4,955.97 is: 7,427.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.57 : 12,980.37 = 4,955.97 : x
  2. Step 2: Convert to fraction form
    8,661.57/12,980.37 = 4,955.97/x
  3. Step 3: Cross multiply
    8,661.57x = 12,980.37 × 4,955.97
  4. Step 4: Simplify right side
    8,661.57x = 64,330,324.31
  5. Step 5: Solve for x
    x = 64,330,324.31/8,661.57
  6. Step 6: Final answer
    x = 7,427.10

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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.