Home / 8,661.21-12,988.59-3,113.04

Finding the Fourth Proportional to 8,661.21, 12,988.59 and 3,113.04

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Solution

The fourth proportional to 8,661.21, 12,988.59 and 3,113.04 is: 4,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.21 : 12,988.59 = 3,113.04 : x
  2. Step 2: Convert to fraction form
    8,661.21/12,988.59 = 3,113.04/x
  3. Step 3: Cross multiply
    8,661.21x = 12,988.59 × 3,113.04
  4. Step 4: Simplify right side
    8,661.21x = 40,434,000.21
  5. Step 5: Solve for x
    x = 40,434,000.21/8,661.21
  6. Step 6: Final answer
    x = 4,668.40

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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.