Home / 2,911.20-4,018.12-1,901.12

Finding the Fourth Proportional to 2,911.20, 4,018.12 and 1,901.12

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Solution

The fourth proportional to 2,911.20, 4,018.12 and 1,901.12 is: 2,623.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.20 : 4,018.12 = 1,901.12 : x
  2. Step 2: Convert to fraction form
    2,911.20/4,018.12 = 1,901.12/x
  3. Step 3: Cross multiply
    2,911.20x = 4,018.12 × 1,901.12
  4. Step 4: Simplify right side
    2,911.20x = 7,638,928.29
  5. Step 5: Solve for x
    x = 7,638,928.29/2,911.20
  6. Step 6: Final answer
    x = 2,623.98

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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.