Home / 12,020.28-18,006.91-8,271.39

Finding the Fourth Proportional to 12,020.28, 18,006.91 and 8,271.39

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Solution

The fourth proportional to 12,020.28, 18,006.91 and 8,271.39 is: 12,390.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,020.28 : 18,006.91 = 8,271.39 : x
  2. Step 2: Convert to fraction form
    12,020.28/18,006.91 = 8,271.39/x
  3. Step 3: Cross multiply
    12,020.28x = 18,006.91 × 8,271.39
  4. Step 4: Simplify right side
    12,020.28x = 148,942,175.30
  5. Step 5: Solve for x
    x = 148,942,175.30/12,020.28
  6. Step 6: Final answer
    x = 12,390.91

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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.