Home / 3,147.23-4,342.10-1,820.45

Finding the Fourth Proportional to 3,147.23, 4,342.10 and 1,820.45

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Solution

The fourth proportional to 3,147.23, 4,342.10 and 1,820.45 is: 2,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.23 : 4,342.10 = 1,820.45 : x
  2. Step 2: Convert to fraction form
    3,147.23/4,342.10 = 1,820.45/x
  3. Step 3: Cross multiply
    3,147.23x = 4,342.10 × 1,820.45
  4. Step 4: Simplify right side
    3,147.23x = 7,904,577.70
  5. Step 5: Solve for x
    x = 7,904,577.70/3,147.23
  6. Step 6: Final answer
    x = 2,511.60

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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.