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Finding the Fourth Proportional to 9,645.50, 13,310.80 and 5,229.50

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Solution

The fourth proportional to 9,645.50, 13,310.80 and 5,229.50 is: 7,216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,645.50 : 13,310.80 = 5,229.50 : x
  2. Step 2: Convert to fraction form
    9,645.50/13,310.80 = 5,229.50/x
  3. Step 3: Cross multiply
    9,645.50x = 13,310.80 × 5,229.50
  4. Step 4: Simplify right side
    9,645.50x = 69,608,828.60
  5. Step 5: Solve for x
    x = 69,608,828.60/9,645.50
  6. Step 6: Final answer
    x = 7,216.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.