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Finding the Fourth Proportional to 9,993, 13,790.56 and 5,516.74

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Solution

The fourth proportional to 9,993, 13,790.56 and 5,516.74 is: 7,613.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,993 : 13,790.56 = 5,516.74 : x
  2. Step 2: Convert to fraction form
    9,993/13,790.56 = 5,516.74/x
  3. Step 3: Cross multiply
    9,993x = 13,790.56 × 5,516.74
  4. Step 4: Simplify right side
    9,993x = 76,078,933.97
  5. Step 5: Solve for x
    x = 76,078,933.97/9,993
  6. Step 6: Final answer
    x = 7,613.22

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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.