Home / 4,981.12-6,874.16-2,991.84

Finding the Fourth Proportional to 4,981.12, 6,874.16 and 2,991.84

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Solution

The fourth proportional to 4,981.12, 6,874.16 and 2,991.84 is: 4,128.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,981.12 : 6,874.16 = 2,991.84 : x
  2. Step 2: Convert to fraction form
    4,981.12/6,874.16 = 2,991.84/x
  3. Step 3: Cross multiply
    4,981.12x = 6,874.16 × 2,991.84
  4. Step 4: Simplify right side
    4,981.12x = 20,566,386.85
  5. Step 5: Solve for x
    x = 20,566,386.85/4,981.12
  6. Step 6: Final answer
    x = 4,128.87

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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.