Home / 2,739.63-3,780.49-2,151.57

Finding the Fourth Proportional to 2,739.63, 3,780.49 and 2,151.57

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Solution

The fourth proportional to 2,739.63, 3,780.49 and 2,151.57 is: 2,969.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.63 : 3,780.49 = 2,151.57 : x
  2. Step 2: Convert to fraction form
    2,739.63/3,780.49 = 2,151.57/x
  3. Step 3: Cross multiply
    2,739.63x = 3,780.49 × 2,151.57
  4. Step 4: Simplify right side
    2,739.63x = 8,133,988.87
  5. Step 5: Solve for x
    x = 8,133,988.87/2,739.63
  6. Step 6: Final answer
    x = 2,969.01

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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.