Home / 9,915.20-13,682.97-5,439.03

Finding the Fourth Proportional to 9,915.20, 13,682.97 and 5,439.03

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Solution

The fourth proportional to 9,915.20, 13,682.97 and 5,439.03 is: 7,505.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.20 : 13,682.97 = 5,439.03 : x
  2. Step 2: Convert to fraction form
    9,915.20/13,682.97 = 5,439.03/x
  3. Step 3: Cross multiply
    9,915.20x = 13,682.97 × 5,439.03
  4. Step 4: Simplify right side
    9,915.20x = 74,422,084.32
  5. Step 5: Solve for x
    x = 74,422,084.32/9,915.20
  6. Step 6: Final answer
    x = 7,505.86

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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.