Home / 12,378.28-17,084.46-7,072.60

Finding the Fourth Proportional to 12,378.28, 17,084.46 and 7,072.60

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Solution

The fourth proportional to 12,378.28, 17,084.46 and 7,072.60 is: 9,761.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.28 : 17,084.46 = 7,072.60 : x
  2. Step 2: Convert to fraction form
    12,378.28/17,084.46 = 7,072.60/x
  3. Step 3: Cross multiply
    12,378.28x = 17,084.46 × 7,072.60
  4. Step 4: Simplify right side
    12,378.28x = 120,831,551.80
  5. Step 5: Solve for x
    x = 120,831,551.80/12,378.28
  6. Step 6: Final answer
    x = 9,761.58

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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.