Home / 2,971.51-4,119.45-2,813.50

Finding the Fourth Proportional to 2,971.51, 4,119.45 and 2,813.50

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Solution

The fourth proportional to 2,971.51, 4,119.45 and 2,813.50 is: 3,900.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.51 : 4,119.45 = 2,813.50 : x
  2. Step 2: Convert to fraction form
    2,971.51/4,119.45 = 2,813.50/x
  3. Step 3: Cross multiply
    2,971.51x = 4,119.45 × 2,813.50
  4. Step 4: Simplify right side
    2,971.51x = 11,590,058.51
  5. Step 5: Solve for x
    x = 11,590,058.51/2,971.51
  6. Step 6: Final answer
    x = 3,900.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.