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Finding the Fourth Proportional to 8,407.80, 12,621 and 7,107.66

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Solution

The fourth proportional to 8,407.80, 12,621 and 7,107.66 is: 10,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,407.80 : 12,621 = 7,107.66 : x
  2. Step 2: Convert to fraction form
    8,407.80/12,621 = 7,107.66/x
  3. Step 3: Cross multiply
    8,407.80x = 12,621 × 7,107.66
  4. Step 4: Simplify right side
    8,407.80x = 89,705,776.86
  5. Step 5: Solve for x
    x = 89,705,776.86/8,407.80
  6. Step 6: Final answer
    x = 10,669.35

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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.