Home / 3,955.79-5,458.93-2,187.40

Finding the Fourth Proportional to 3,955.79, 5,458.93 and 2,187.40

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Solution

The fourth proportional to 3,955.79, 5,458.93 and 2,187.40 is: 3,018.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,955.79 : 5,458.93 = 2,187.40 : x
  2. Step 2: Convert to fraction form
    3,955.79/5,458.93 = 2,187.40/x
  3. Step 3: Cross multiply
    3,955.79x = 5,458.93 × 2,187.40
  4. Step 4: Simplify right side
    3,955.79x = 11,940,853.07
  5. Step 5: Solve for x
    x = 11,940,853.07/3,955.79
  6. Step 6: Final answer
    x = 3,018.57

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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.