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Finding the Fourth Proportional to 5,779.21, 7,975.29 and 3,126.61

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Solution

The fourth proportional to 5,779.21, 7,975.29 and 3,126.61 is: 4,314.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,779.21 : 7,975.29 = 3,126.61 : x
  2. Step 2: Convert to fraction form
    5,779.21/7,975.29 = 3,126.61/x
  3. Step 3: Cross multiply
    5,779.21x = 7,975.29 × 3,126.61
  4. Step 4: Simplify right side
    5,779.21x = 24,935,621.47
  5. Step 5: Solve for x
    x = 24,935,621.47/5,779.21
  6. Step 6: Final answer
    x = 4,314.71

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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.