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Finding the Fourth Proportional to 9,861.96, 13,609.70 and 5,445.96

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Solution

The fourth proportional to 9,861.96, 13,609.70 and 5,445.96 is: 7,515.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,861.96 : 13,609.70 = 5,445.96 : x
  2. Step 2: Convert to fraction form
    9,861.96/13,609.70 = 5,445.96/x
  3. Step 3: Cross multiply
    9,861.96x = 13,609.70 × 5,445.96
  4. Step 4: Simplify right side
    9,861.96x = 74,117,881.81
  5. Step 5: Solve for x
    x = 74,117,881.81/9,861.96
  6. Step 6: Final answer
    x = 7,515.53

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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.