Home / 3,915.81-5,872.26-1,318.14

Finding the Fourth Proportional to 3,915.81, 5,872.26 and 1,318.14

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Solution

The fourth proportional to 3,915.81, 5,872.26 and 1,318.14 is: 1,976.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.81 : 5,872.26 = 1,318.14 : x
  2. Step 2: Convert to fraction form
    3,915.81/5,872.26 = 1,318.14/x
  3. Step 3: Cross multiply
    3,915.81x = 5,872.26 × 1,318.14
  4. Step 4: Simplify right side
    3,915.81x = 7,740,460.80
  5. Step 5: Solve for x
    x = 7,740,460.80/3,915.81
  6. Step 6: Final answer
    x = 1,976.72

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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.