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Finding the Fourth Proportional to 8,661.36, 11,954.48 and 5,671.65

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Solution

The fourth proportional to 8,661.36, 11,954.48 and 5,671.65 is: 7,828.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.36 : 11,954.48 = 5,671.65 : x
  2. Step 2: Convert to fraction form
    8,661.36/11,954.48 = 5,671.65/x
  3. Step 3: Cross multiply
    8,661.36x = 11,954.48 × 5,671.65
  4. Step 4: Simplify right side
    8,661.36x = 67,801,598.13
  5. Step 5: Solve for x
    x = 67,801,598.13/8,661.36
  6. Step 6: Final answer
    x = 7,828.05

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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.