Home / 7,820.23-11,729.10-2,555.20

Finding the Fourth Proportional to 7,820.23, 11,729.10 and 2,555.20

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Solution

The fourth proportional to 7,820.23, 11,729.10 and 2,555.20 is: 3,832.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820.23 : 11,729.10 = 2,555.20 : x
  2. Step 2: Convert to fraction form
    7,820.23/11,729.10 = 2,555.20/x
  3. Step 3: Cross multiply
    7,820.23x = 11,729.10 × 2,555.20
  4. Step 4: Simplify right side
    7,820.23x = 29,970,137.67
  5. Step 5: Solve for x
    x = 29,970,137.67/7,820.23
  6. Step 6: Final answer
    x = 3,832.39

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1.5x scale

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.