Home / 3,613.80-5,420.70-1,421.33

Finding the Fourth Proportional to 3,613.80, 5,420.70 and 1,421.33

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Solution

The fourth proportional to 3,613.80, 5,420.70 and 1,421.33 is: 2,132.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.80 : 5,420.70 = 1,421.33 : x
  2. Step 2: Convert to fraction form
    3,613.80/5,420.70 = 1,421.33/x
  3. Step 3: Cross multiply
    3,613.80x = 5,420.70 × 1,421.33
  4. Step 4: Simplify right side
    3,613.80x = 7,704,603.53
  5. Step 5: Solve for x
    x = 7,704,603.53/3,613.80
  6. Step 6: Final answer
    x = 2,132.00

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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.