Home / 2,991.12-4,127.91-1,812.30

Finding the Fourth Proportional to 2,991.12, 4,127.91 and 1,812.30

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Solution

The fourth proportional to 2,991.12, 4,127.91 and 1,812.30 is: 2,501.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.12 : 4,127.91 = 1,812.30 : x
  2. Step 2: Convert to fraction form
    2,991.12/4,127.91 = 1,812.30/x
  3. Step 3: Cross multiply
    2,991.12x = 4,127.91 × 1,812.30
  4. Step 4: Simplify right side
    2,991.12x = 7,481,011.29
  5. Step 5: Solve for x
    x = 7,481,011.29/2,991.12
  6. Step 6: Final answer
    x = 2,501.07

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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.