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Finding the Fourth Proportional to 9,893.70, 13,652.42 and 5,645.79

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Solution

The fourth proportional to 9,893.70, 13,652.42 and 5,645.79 is: 7,790.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,893.70 : 13,652.42 = 5,645.79 : x
  2. Step 2: Convert to fraction form
    9,893.70/13,652.42 = 5,645.79/x
  3. Step 3: Cross multiply
    9,893.70x = 13,652.42 × 5,645.79
  4. Step 4: Simplify right side
    9,893.70x = 77,078,668.08
  5. Step 5: Solve for x
    x = 77,078,668.08/9,893.70
  6. Step 6: Final answer
    x = 7,790.68

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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.