Home / 2,986.72-4,123.73-1,868.20

Finding the Fourth Proportional to 2,986.72, 4,123.73 and 1,868.20

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Solution

The fourth proportional to 2,986.72, 4,123.73 and 1,868.20 is: 2,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.72 : 4,123.73 = 1,868.20 : x
  2. Step 2: Convert to fraction form
    2,986.72/4,123.73 = 1,868.20/x
  3. Step 3: Cross multiply
    2,986.72x = 4,123.73 × 1,868.20
  4. Step 4: Simplify right side
    2,986.72x = 7,703,943.05
  5. Step 5: Solve for x
    x = 7,703,943.05/2,986.72
  6. Step 6: Final answer
    x = 2,579.40

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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.