Home / 18,915.98-28,378.12-5,768.02

Finding the Fourth Proportional to 18,915.98, 28,378.12 and 5,768.02

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Solution

The fourth proportional to 18,915.98, 28,378.12 and 5,768.02 is: 8,653.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.98 : 28,378.12 = 5,768.02 : x
  2. Step 2: Convert to fraction form
    18,915.98/28,378.12 = 5,768.02/x
  3. Step 3: Cross multiply
    18,915.98x = 28,378.12 × 5,768.02
  4. Step 4: Simplify right side
    18,915.98x = 163,685,563.72
  5. Step 5: Solve for x
    x = 163,685,563.72/18,915.98
  6. Step 6: Final answer
    x = 8,653.30

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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.