Home / 6,921-9,551.09-3,777.20

Finding the Fourth Proportional to 6,921, 9,551.09 and 3,777.20

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Solution

The fourth proportional to 6,921, 9,551.09 and 3,777.20 is: 5,212.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921 : 9,551.09 = 3,777.20 : x
  2. Step 2: Convert to fraction form
    6,921/9,551.09 = 3,777.20/x
  3. Step 3: Cross multiply
    6,921x = 9,551.09 × 3,777.20
  4. Step 4: Simplify right side
    6,921x = 36,076,310.51
  5. Step 5: Solve for x
    x = 36,076,310.51/6,921
  6. Step 6: Final answer
    x = 5,212.59

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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.