Home / 2,991.56-4,130.38-1,872.96

Finding the Fourth Proportional to 2,991.56, 4,130.38 and 1,872.96

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Solution

The fourth proportional to 2,991.56, 4,130.38 and 1,872.96 is: 2,585.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.56 : 4,130.38 = 1,872.96 : x
  2. Step 2: Convert to fraction form
    2,991.56/4,130.38 = 1,872.96/x
  3. Step 3: Cross multiply
    2,991.56x = 4,130.38 × 1,872.96
  4. Step 4: Simplify right side
    2,991.56x = 7,736,036.52
  5. Step 5: Solve for x
    x = 7,736,036.52/2,991.56
  6. Step 6: Final answer
    x = 2,585.95

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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.