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Finding the Fourth Proportional to 4,911.70, 6,861.80 and 4,911.70

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Solution

The fourth proportional to 4,911.70, 6,861.80 and 4,911.70 is: 6,861.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,911.70 : 6,861.80 = 4,911.70 : x
  2. Step 2: Convert to fraction form
    4,911.70/6,861.80 = 4,911.70/x
  3. Step 3: Cross multiply
    4,911.70x = 6,861.80 × 4,911.70
  4. Step 4: Simplify right side
    4,911.70x = 33,703,103.06
  5. Step 5: Solve for x
    x = 33,703,103.06/4,911.70
  6. Step 6: Final answer
    x = 6,861.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.