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Finding the Fourth Proportional to 9,329.40, 13,994.10 and 8,389.80

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Solution

The fourth proportional to 9,329.40, 13,994.10 and 8,389.80 is: 12,584.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,329.40 : 13,994.10 = 8,389.80 : x
  2. Step 2: Convert to fraction form
    9,329.40/13,994.10 = 8,389.80/x
  3. Step 3: Cross multiply
    9,329.40x = 13,994.10 × 8,389.80
  4. Step 4: Simplify right side
    9,329.40x = 117,407,700.18
  5. Step 5: Solve for x
    x = 117,407,700.18/9,329.40
  6. Step 6: Final answer
    x = 12,584.70

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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.