Home / 2,981.18-4,118.38-2,199.54

Finding the Fourth Proportional to 2,981.18, 4,118.38 and 2,199.54

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Solution

The fourth proportional to 2,981.18, 4,118.38 and 2,199.54 is: 3,038.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.18 : 4,118.38 = 2,199.54 : x
  2. Step 2: Convert to fraction form
    2,981.18/4,118.38 = 2,199.54/x
  3. Step 3: Cross multiply
    2,981.18x = 4,118.38 × 2,199.54
  4. Step 4: Simplify right side
    2,981.18x = 9,058,541.55
  5. Step 5: Solve for x
    x = 9,058,541.55/2,981.18
  6. Step 6: Final answer
    x = 3,038.58

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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.