Home / 7,820.74-11,729.69-3,140.56

Finding the Fourth Proportional to 7,820.74, 11,729.69 and 3,140.56

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Solution

The fourth proportional to 7,820.74, 11,729.69 and 3,140.56 is: 4,710.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820.74 : 11,729.69 = 3,140.56 : x
  2. Step 2: Convert to fraction form
    7,820.74/11,729.69 = 3,140.56/x
  3. Step 3: Cross multiply
    7,820.74x = 11,729.69 × 3,140.56
  4. Step 4: Simplify right side
    7,820.74x = 36,837,805.96
  5. Step 5: Solve for x
    x = 36,837,805.96/7,820.74
  6. Step 6: Final answer
    x = 4,710.27

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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.