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Finding the Fourth Proportional to 7,182.64, 10,779.72 and 3,720.88

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Solution

The fourth proportional to 7,182.64, 10,779.72 and 3,720.88 is: 5,584.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,182.64 : 10,779.72 = 3,720.88 : x
  2. Step 2: Convert to fraction form
    7,182.64/10,779.72 = 3,720.88/x
  3. Step 3: Cross multiply
    7,182.64x = 10,779.72 × 3,720.88
  4. Step 4: Simplify right side
    7,182.64x = 40,110,044.55
  5. Step 5: Solve for x
    x = 40,110,044.55/7,182.64
  6. Step 6: Final answer
    x = 5,584.30

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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.