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Finding the Fourth Proportional to 8,421.93, 12,634.16 and 2,720.99

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Solution

The fourth proportional to 8,421.93, 12,634.16 and 2,720.99 is: 4,081.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.93 : 12,634.16 = 2,720.99 : x
  2. Step 2: Convert to fraction form
    8,421.93/12,634.16 = 2,720.99/x
  3. Step 3: Cross multiply
    8,421.93x = 12,634.16 × 2,720.99
  4. Step 4: Simplify right side
    8,421.93x = 34,377,443.91
  5. Step 5: Solve for x
    x = 34,377,443.91/8,421.93
  6. Step 6: Final answer
    x = 4,081.89

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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.