Home / 20,091.12-30,136.56-10,915.44

Finding the Fourth Proportional to 20,091.12, 30,136.56 and 10,915.44

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Solution

The fourth proportional to 20,091.12, 30,136.56 and 10,915.44 is: 16,373.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.12 : 30,136.56 = 10,915.44 : x
  2. Step 2: Convert to fraction form
    20,091.12/30,136.56 = 10,915.44/x
  3. Step 3: Cross multiply
    20,091.12x = 30,136.56 × 10,915.44
  4. Step 4: Simplify right side
    20,091.12x = 328,953,812.49
  5. Step 5: Solve for x
    x = 328,953,812.49/20,091.12
  6. Step 6: Final answer
    x = 16,373.09

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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.