Home / 2,159.21-3,237.12-1,986.23

Finding the Fourth Proportional to 2,159.21, 3,237.12 and 1,986.23

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Solution

The fourth proportional to 2,159.21, 3,237.12 and 1,986.23 is: 2,977.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.21 : 3,237.12 = 1,986.23 : x
  2. Step 2: Convert to fraction form
    2,159.21/3,237.12 = 1,986.23/x
  3. Step 3: Cross multiply
    2,159.21x = 3,237.12 × 1,986.23
  4. Step 4: Simplify right side
    2,159.21x = 6,429,648.67
  5. Step 5: Solve for x
    x = 6,429,648.67/2,159.21
  6. Step 6: Final answer
    x = 2,977.79

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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.