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Finding the Fourth Proportional to 8,620.12, 12,919.77 and 6,117.39

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Solution

The fourth proportional to 8,620.12, 12,919.77 and 6,117.39 is: 9,168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.12 : 12,919.77 = 6,117.39 : x
  2. Step 2: Convert to fraction form
    8,620.12/12,919.77 = 6,117.39/x
  3. Step 3: Cross multiply
    8,620.12x = 12,919.77 × 6,117.39
  4. Step 4: Simplify right side
    8,620.12x = 79,035,271.80
  5. Step 5: Solve for x
    x = 79,035,271.80/8,620.12
  6. Step 6: Final answer
    x = 9,168.70

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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.