Home / 2,120.15-3,181.75-1,570.68

Finding the Fourth Proportional to 2,120.15, 3,181.75 and 1,570.68

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Solution

The fourth proportional to 2,120.15, 3,181.75 and 1,570.68 is: 2,357.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.15 : 3,181.75 = 1,570.68 : x
  2. Step 2: Convert to fraction form
    2,120.15/3,181.75 = 1,570.68/x
  3. Step 3: Cross multiply
    2,120.15x = 3,181.75 × 1,570.68
  4. Step 4: Simplify right side
    2,120.15x = 4,997,507.16
  5. Step 5: Solve for x
    x = 4,997,507.16/2,120.15
  6. Step 6: Final answer
    x = 2,357.15

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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.