Home / 2,887.68-3,974.72-2,140.35

Finding the Fourth Proportional to 2,887.68, 3,974.72 and 2,140.35

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Solution

The fourth proportional to 2,887.68, 3,974.72 and 2,140.35 is: 2,946.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.68 : 3,974.72 = 2,140.35 : x
  2. Step 2: Convert to fraction form
    2,887.68/3,974.72 = 2,140.35/x
  3. Step 3: Cross multiply
    2,887.68x = 3,974.72 × 2,140.35
  4. Step 4: Simplify right side
    2,887.68x = 8,507,281.25
  5. Step 5: Solve for x
    x = 8,507,281.25/2,887.68
  6. Step 6: Final answer
    x = 2,946.06

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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.