Home / 8,421.72-12,632.62-2,181.29

Finding the Fourth Proportional to 8,421.72, 12,632.62 and 2,181.29

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Solution

The fourth proportional to 8,421.72, 12,632.62 and 2,181.29 is: 3,271.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.72 : 12,632.62 = 2,181.29 : x
  2. Step 2: Convert to fraction form
    8,421.72/12,632.62 = 2,181.29/x
  3. Step 3: Cross multiply
    8,421.72x = 12,632.62 × 2,181.29
  4. Step 4: Simplify right side
    8,421.72x = 27,555,396.77
  5. Step 5: Solve for x
    x = 27,555,396.77/8,421.72
  6. Step 6: Final answer
    x = 3,271.95

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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.