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Finding the Fourth Proportional to 18,610.50, 27,915.84 and 4,759.50

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Solution

The fourth proportional to 18,610.50, 27,915.84 and 4,759.50 is: 7,139.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,610.50 : 27,915.84 = 4,759.50 : x
  2. Step 2: Convert to fraction form
    18,610.50/27,915.84 = 4,759.50/x
  3. Step 3: Cross multiply
    18,610.50x = 27,915.84 × 4,759.50
  4. Step 4: Simplify right side
    18,610.50x = 132,865,440.48
  5. Step 5: Solve for x
    x = 132,865,440.48/18,610.50
  6. Step 6: Final answer
    x = 7,139.27

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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.