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Finding the Fourth Proportional to 7,188.70, 10,779.85 and 3,294.30

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Solution

The fourth proportional to 7,188.70, 10,779.85 and 3,294.30 is: 4,939.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.70 : 10,779.85 = 3,294.30 : x
  2. Step 2: Convert to fraction form
    7,188.70/10,779.85 = 3,294.30/x
  3. Step 3: Cross multiply
    7,188.70x = 10,779.85 × 3,294.30
  4. Step 4: Simplify right side
    7,188.70x = 35,512,059.86
  5. Step 5: Solve for x
    x = 35,512,059.86/7,188.70
  6. Step 6: Final answer
    x = 4,939.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.