Home / 2,991.35-4,128.20-1,812.53

Finding the Fourth Proportional to 2,991.35, 4,128.20 and 1,812.53

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Solution

The fourth proportional to 2,991.35, 4,128.20 and 1,812.53 is: 2,501.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.35 : 4,128.20 = 1,812.53 : x
  2. Step 2: Convert to fraction form
    2,991.35/4,128.20 = 1,812.53/x
  3. Step 3: Cross multiply
    2,991.35x = 4,128.20 × 1,812.53
  4. Step 4: Simplify right side
    2,991.35x = 7,482,470.24
  5. Step 5: Solve for x
    x = 7,482,470.24/2,991.35
  6. Step 6: Final answer
    x = 2,501.37

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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.