Home / 6,309.90-8,700.48-5,172

Finding the Fourth Proportional to 6,309.90, 8,700.48 and 5,172

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Solution

The fourth proportional to 6,309.90, 8,700.48 and 5,172 is: 7,131.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,309.90 : 8,700.48 = 5,172 : x
  2. Step 2: Convert to fraction form
    6,309.90/8,700.48 = 5,172/x
  3. Step 3: Cross multiply
    6,309.90x = 8,700.48 × 5,172
  4. Step 4: Simplify right side
    6,309.90x = 44,998,882.56
  5. Step 5: Solve for x
    x = 44,998,882.56/6,309.90
  6. Step 6: Final answer
    x = 7,131.47

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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.