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Finding the Fourth Proportional to 8,661.12, 11,954.24 and 5,125.12

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Solution

The fourth proportional to 8,661.12, 11,954.24 and 5,125.12 is: 7,073.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.12 : 11,954.24 = 5,125.12 : x
  2. Step 2: Convert to fraction form
    8,661.12/11,954.24 = 5,125.12/x
  3. Step 3: Cross multiply
    8,661.12x = 11,954.24 × 5,125.12
  4. Step 4: Simplify right side
    8,661.12x = 61,266,914.51
  5. Step 5: Solve for x
    x = 61,266,914.51/8,661.12
  6. Step 6: Final answer
    x = 7,073.79

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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.