Home / 6,420.47-8,859.78-3,767.51

Finding the Fourth Proportional to 6,420.47, 8,859.78 and 3,767.51

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Solution

The fourth proportional to 6,420.47, 8,859.78 and 3,767.51 is: 5,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.47 : 8,859.78 = 3,767.51 : x
  2. Step 2: Convert to fraction form
    6,420.47/8,859.78 = 3,767.51/x
  3. Step 3: Cross multiply
    6,420.47x = 8,859.78 × 3,767.51
  4. Step 4: Simplify right side
    6,420.47x = 33,379,331.90
  5. Step 5: Solve for x
    x = 33,379,331.90/6,420.47
  6. Step 6: Final answer
    x = 5,198.90

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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.