Home / 2,191.40-3,271.49-2,114.51

Finding the Fourth Proportional to 2,191.40, 3,271.49 and 2,114.51

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Solution

The fourth proportional to 2,191.40, 3,271.49 and 2,114.51 is: 3,156.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.40 : 3,271.49 = 2,114.51 : x
  2. Step 2: Convert to fraction form
    2,191.40/3,271.49 = 2,114.51/x
  3. Step 3: Cross multiply
    2,191.40x = 3,271.49 × 2,114.51
  4. Step 4: Simplify right side
    2,191.40x = 6,917,579.32
  5. Step 5: Solve for x
    x = 6,917,579.32/2,191.40
  6. Step 6: Final answer
    x = 3,156.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.