Home / 3,816.90-5,269.86-2,931.12

Finding the Fourth Proportional to 3,816.90, 5,269.86 and 2,931.12

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Solution

The fourth proportional to 3,816.90, 5,269.86 and 2,931.12 is: 4,046.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,816.90 : 5,269.86 = 2,931.12 : x
  2. Step 2: Convert to fraction form
    3,816.90/5,269.86 = 2,931.12/x
  3. Step 3: Cross multiply
    3,816.90x = 5,269.86 × 2,931.12
  4. Step 4: Simplify right side
    3,816.90x = 15,446,592.04
  5. Step 5: Solve for x
    x = 15,446,592.04/3,816.90
  6. Step 6: Final answer
    x = 4,046.89

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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.