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Finding the Fourth Proportional to 8,065.60, 11,150.49 and 7,991.71

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Solution

The fourth proportional to 8,065.60, 11,150.49 and 7,991.71 is: 11,048.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,065.60 : 11,150.49 = 7,991.71 : x
  2. Step 2: Convert to fraction form
    8,065.60/11,150.49 = 7,991.71/x
  3. Step 3: Cross multiply
    8,065.60x = 11,150.49 × 7,991.71
  4. Step 4: Simplify right side
    8,065.60x = 89,111,482.44
  5. Step 5: Solve for x
    x = 89,111,482.44/8,065.60
  6. Step 6: Final answer
    x = 11,048.34

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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.