Home / 20,091.62-27,711.50-12,915.02

Finding the Fourth Proportional to 20,091.62, 27,711.50 and 12,915.02

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Solution

The fourth proportional to 20,091.62, 27,711.50 and 12,915.02 is: 17,813.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.62 : 27,711.50 = 12,915.02 : x
  2. Step 2: Convert to fraction form
    20,091.62/27,711.50 = 12,915.02/x
  3. Step 3: Cross multiply
    20,091.62x = 27,711.50 × 12,915.02
  4. Step 4: Simplify right side
    20,091.62x = 357,894,576.73
  5. Step 5: Solve for x
    x = 357,894,576.73/20,091.62
  6. Step 6: Final answer
    x = 17,813.13

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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.