Home / 9,909.30-13,684.09-6,378.64

Finding the Fourth Proportional to 9,909.30, 13,684.09 and 6,378.64

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Solution

The fourth proportional to 9,909.30, 13,684.09 and 6,378.64 is: 8,808.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,909.30 : 13,684.09 = 6,378.64 : x
  2. Step 2: Convert to fraction form
    9,909.30/13,684.09 = 6,378.64/x
  3. Step 3: Cross multiply
    9,909.30x = 13,684.09 × 6,378.64
  4. Step 4: Simplify right side
    9,909.30x = 87,285,883.84
  5. Step 5: Solve for x
    x = 87,285,883.84/9,909.30
  6. Step 6: Final answer
    x = 8,808.48

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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.