Home / 4,192.80-6,290.38-3,420.12

Finding the Fourth Proportional to 4,192.80, 6,290.38 and 3,420.12

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Solution

The fourth proportional to 4,192.80, 6,290.38 and 3,420.12 is: 5,131.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,192.80 : 6,290.38 = 3,420.12 : x
  2. Step 2: Convert to fraction form
    4,192.80/6,290.38 = 3,420.12/x
  3. Step 3: Cross multiply
    4,192.80x = 6,290.38 × 3,420.12
  4. Step 4: Simplify right side
    4,192.80x = 21,513,854.45
  5. Step 5: Solve for x
    x = 21,513,854.45/4,192.80
  6. Step 6: Final answer
    x = 5,131.14

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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.