Home / 10,661.40-15,996.90-5,112.60

Finding the Fourth Proportional to 10,661.40, 15,996.90 and 5,112.60

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Solution

The fourth proportional to 10,661.40, 15,996.90 and 5,112.60 is: 7,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.40 : 15,996.90 = 5,112.60 : x
  2. Step 2: Convert to fraction form
    10,661.40/15,996.90 = 5,112.60/x
  3. Step 3: Cross multiply
    10,661.40x = 15,996.90 × 5,112.60
  4. Step 4: Simplify right side
    10,661.40x = 81,785,750.94
  5. Step 5: Solve for x
    x = 81,785,750.94/10,661.40
  6. Step 6: Final answer
    x = 7,671.20

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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.