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Finding the Fourth Proportional to 9,965.50, 13,752.22 and 5,489.67

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Solution

The fourth proportional to 9,965.50, 13,752.22 and 5,489.67 is: 7,575.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,965.50 : 13,752.22 = 5,489.67 : x
  2. Step 2: Convert to fraction form
    9,965.50/13,752.22 = 5,489.67/x
  3. Step 3: Cross multiply
    9,965.50x = 13,752.22 × 5,489.67
  4. Step 4: Simplify right side
    9,965.50x = 75,495,128.91
  5. Step 5: Solve for x
    x = 75,495,128.91/9,965.50
  6. Step 6: Final answer
    x = 7,575.65

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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.