Home / 6,420.80-8,860.62-3,767.72

Finding the Fourth Proportional to 6,420.80, 8,860.62 and 3,767.72

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Solution

The fourth proportional to 6,420.80, 8,860.62 and 3,767.72 is: 5,199.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.80 : 8,860.62 = 3,767.72 : x
  2. Step 2: Convert to fraction form
    6,420.80/8,860.62 = 3,767.72/x
  3. Step 3: Cross multiply
    6,420.80x = 8,860.62 × 3,767.72
  4. Step 4: Simplify right side
    6,420.80x = 33,384,305.01
  5. Step 5: Solve for x
    x = 33,384,305.01/6,420.80
  6. Step 6: Final answer
    x = 5,199.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.