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Finding the Fourth Proportional to 5,779.50, 7,975.72 and 3,126.90

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Solution

The fourth proportional to 5,779.50, 7,975.72 and 3,126.90 is: 4,315.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,779.50 : 7,975.72 = 3,126.90 : x
  2. Step 2: Convert to fraction form
    5,779.50/7,975.72 = 3,126.90/x
  3. Step 3: Cross multiply
    5,779.50x = 7,975.72 × 3,126.90
  4. Step 4: Simplify right side
    5,779.50x = 24,939,278.87
  5. Step 5: Solve for x
    x = 24,939,278.87/5,779.50
  6. Step 6: Final answer
    x = 4,315.13

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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.