Home / 3,421.21-5,131.80-2,642.34

Finding the Fourth Proportional to 3,421.21, 5,131.80 and 2,642.34

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Solution

The fourth proportional to 3,421.21, 5,131.80 and 2,642.34 is: 3,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.21 : 5,131.80 = 2,642.34 : x
  2. Step 2: Convert to fraction form
    3,421.21/5,131.80 = 2,642.34/x
  3. Step 3: Cross multiply
    3,421.21x = 5,131.80 × 2,642.34
  4. Step 4: Simplify right side
    3,421.21x = 13,559,960.41
  5. Step 5: Solve for x
    x = 13,559,960.41/3,421.21
  6. Step 6: Final answer
    x = 3,963.50

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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.