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Finding the Fourth Proportional to 8,976.15, 13,461.39 and 8,309.12

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Solution

The fourth proportional to 8,976.15, 13,461.39 and 8,309.12 is: 12,461.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.15 : 13,461.39 = 8,309.12 : x
  2. Step 2: Convert to fraction form
    8,976.15/13,461.39 = 8,309.12/x
  3. Step 3: Cross multiply
    8,976.15x = 13,461.39 × 8,309.12
  4. Step 4: Simplify right side
    8,976.15x = 111,852,237.57
  5. Step 5: Solve for x
    x = 111,852,237.57/8,976.15
  6. Step 6: Final answer
    x = 12,461.05

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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.