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Finding the Fourth Proportional to 5,779.59, 7,975.80 and 3,126.98

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Solution

The fourth proportional to 5,779.59, 7,975.80 and 3,126.98 is: 4,315.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,779.59 : 7,975.80 = 3,126.98 : x
  2. Step 2: Convert to fraction form
    5,779.59/7,975.80 = 3,126.98/x
  3. Step 3: Cross multiply
    5,779.59x = 7,975.80 × 3,126.98
  4. Step 4: Simplify right side
    5,779.59x = 24,940,127.21
  5. Step 5: Solve for x
    x = 24,940,127.21/5,779.59
  6. Step 6: Final answer
    x = 4,315.21

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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.