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Finding the Fourth Proportional to 9,571.80, 14,325.30 and 8,405.40

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Solution

The fourth proportional to 9,571.80, 14,325.30 and 8,405.40 is: 12,579.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,571.80 : 14,325.30 = 8,405.40 : x
  2. Step 2: Convert to fraction form
    9,571.80/14,325.30 = 8,405.40/x
  3. Step 3: Cross multiply
    9,571.80x = 14,325.30 × 8,405.40
  4. Step 4: Simplify right side
    9,571.80x = 120,409,876.62
  5. Step 5: Solve for x
    x = 120,409,876.62/9,571.80
  6. Step 6: Final answer
    x = 12,579.65

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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.