Home / 3,421.50-5,131.80-1,340.07

Finding the Fourth Proportional to 3,421.50, 5,131.80 and 1,340.07

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Solution

The fourth proportional to 3,421.50, 5,131.80 and 1,340.07 is: 2,009.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.50 : 5,131.80 = 1,340.07 : x
  2. Step 2: Convert to fraction form
    3,421.50/5,131.80 = 1,340.07/x
  3. Step 3: Cross multiply
    3,421.50x = 5,131.80 × 1,340.07
  4. Step 4: Simplify right side
    3,421.50x = 6,876,971.23
  5. Step 5: Solve for x
    x = 6,876,971.23/3,421.50
  6. Step 6: Final answer
    x = 2,009.93

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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.