Home / 3,933.66-5,428.58-2,165.40

Finding the Fourth Proportional to 3,933.66, 5,428.58 and 2,165.40

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Solution

The fourth proportional to 3,933.66, 5,428.58 and 2,165.40 is: 2,988.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,933.66 : 5,428.58 = 2,165.40 : x
  2. Step 2: Convert to fraction form
    3,933.66/5,428.58 = 2,165.40/x
  3. Step 3: Cross multiply
    3,933.66x = 5,428.58 × 2,165.40
  4. Step 4: Simplify right side
    3,933.66x = 11,755,047.13
  5. Step 5: Solve for x
    x = 11,755,047.13/3,933.66
  6. Step 6: Final answer
    x = 2,988.32

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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.