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Finding the Fourth Proportional to 9,909.45, 13,674.63 and 5,928.21

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Solution

The fourth proportional to 9,909.45, 13,674.63 and 5,928.21 is: 8,180.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,909.45 : 13,674.63 = 5,928.21 : x
  2. Step 2: Convert to fraction form
    9,909.45/13,674.63 = 5,928.21/x
  3. Step 3: Cross multiply
    9,909.45x = 13,674.63 × 5,928.21
  4. Step 4: Simplify right side
    9,909.45x = 81,066,078.31
  5. Step 5: Solve for x
    x = 81,066,078.31/9,909.45
  6. Step 6: Final answer
    x = 8,180.68

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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.