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Finding the Fourth Proportional to 8,667.10, 13,000.65 and 3,121.30

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Solution

The fourth proportional to 8,667.10, 13,000.65 and 3,121.30 is: 4,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,667.10 : 13,000.65 = 3,121.30 : x
  2. Step 2: Convert to fraction form
    8,667.10/13,000.65 = 3,121.30/x
  3. Step 3: Cross multiply
    8,667.10x = 13,000.65 × 3,121.30
  4. Step 4: Simplify right side
    8,667.10x = 40,578,928.85
  5. Step 5: Solve for x
    x = 40,578,928.85/8,667.10
  6. Step 6: Final answer
    x = 4,681.95

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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.