Home / 20,188.72-30,302.52-18,915.44

Finding the Fourth Proportional to 20,188.72, 30,302.52 and 18,915.44

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Solution

The fourth proportional to 20,188.72, 30,302.52 and 18,915.44 is: 28,391.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188.72 : 30,302.52 = 18,915.44 : x
  2. Step 2: Convert to fraction form
    20,188.72/30,302.52 = 18,915.44/x
  3. Step 3: Cross multiply
    20,188.72x = 30,302.52 × 18,915.44
  4. Step 4: Simplify right side
    20,188.72x = 573,185,498.91
  5. Step 5: Solve for x
    x = 573,185,498.91/20,188.72
  6. Step 6: Final answer
    x = 28,391.37

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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.