Home / 2,911.58-4,018.92-2,165.30

Finding the Fourth Proportional to 2,911.58, 4,018.92 and 2,165.30

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Solution

The fourth proportional to 2,911.58, 4,018.92 and 2,165.30 is: 2,988.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.58 : 4,018.92 = 2,165.30 : x
  2. Step 2: Convert to fraction form
    2,911.58/4,018.92 = 2,165.30/x
  3. Step 3: Cross multiply
    2,911.58x = 4,018.92 × 2,165.30
  4. Step 4: Simplify right side
    2,911.58x = 8,702,167.48
  5. Step 5: Solve for x
    x = 8,702,167.48/2,911.58
  6. Step 6: Final answer
    x = 2,988.81

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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.