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Finding the Fourth Proportional to 7,905.75, 10,909.86 and 4,368.90

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Solution

The fourth proportional to 7,905.75, 10,909.86 and 4,368.90 is: 6,029.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.75 : 10,909.86 = 4,368.90 : x
  2. Step 2: Convert to fraction form
    7,905.75/10,909.86 = 4,368.90/x
  3. Step 3: Cross multiply
    7,905.75x = 10,909.86 × 4,368.90
  4. Step 4: Simplify right side
    7,905.75x = 47,664,087.35
  5. Step 5: Solve for x
    x = 47,664,087.35/7,905.75
  6. Step 6: Final answer
    x = 6,029.04

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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.