Home / 20,136.70-30,205.05-12,717.10

Finding the Fourth Proportional to 20,136.70, 30,205.05 and 12,717.10

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Solution

The fourth proportional to 20,136.70, 30,205.05 and 12,717.10 is: 19,075.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.70 : 30,205.05 = 12,717.10 : x
  2. Step 2: Convert to fraction form
    20,136.70/30,205.05 = 12,717.10/x
  3. Step 3: Cross multiply
    20,136.70x = 30,205.05 × 12,717.10
  4. Step 4: Simplify right side
    20,136.70x = 384,120,641.36
  5. Step 5: Solve for x
    x = 384,120,641.36/20,136.70
  6. Step 6: Final answer
    x = 19,075.65

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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.