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Finding the Fourth Proportional to 9,970.91, 13,760.78 and 5,991.92

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Solution

The fourth proportional to 9,970.91, 13,760.78 and 5,991.92 is: 8,269.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,970.91 : 13,760.78 = 5,991.92 : x
  2. Step 2: Convert to fraction form
    9,970.91/13,760.78 = 5,991.92/x
  3. Step 3: Cross multiply
    9,970.91x = 13,760.78 × 5,991.92
  4. Step 4: Simplify right side
    9,970.91x = 82,453,394.13
  5. Step 5: Solve for x
    x = 82,453,394.13/9,970.91
  6. Step 6: Final answer
    x = 8,269.40

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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.