Home / 2,991.24-4,128.28-1,812.31

Finding the Fourth Proportional to 2,991.24, 4,128.28 and 1,812.31

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Solution

The fourth proportional to 2,991.24, 4,128.28 and 1,812.31 is: 2,501.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.24 : 4,128.28 = 1,812.31 : x
  2. Step 2: Convert to fraction form
    2,991.24/4,128.28 = 1,812.31/x
  3. Step 3: Cross multiply
    2,991.24x = 4,128.28 × 1,812.31
  4. Step 4: Simplify right side
    2,991.24x = 7,481,708.28
  5. Step 5: Solve for x
    x = 7,481,708.28/2,991.24
  6. Step 6: Final answer
    x = 2,501.21

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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.