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Finding the Fourth Proportional to 8,890.85, 12,270.23 and 4,912.23

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Solution

The fourth proportional to 8,890.85, 12,270.23 and 4,912.23 is: 6,779.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,890.85 : 12,270.23 = 4,912.23 : x
  2. Step 2: Convert to fraction form
    8,890.85/12,270.23 = 4,912.23/x
  3. Step 3: Cross multiply
    8,890.85x = 12,270.23 × 4,912.23
  4. Step 4: Simplify right side
    8,890.85x = 60,274,167.35
  5. Step 5: Solve for x
    x = 60,274,167.35/8,890.85
  6. Step 6: Final answer
    x = 6,779.35

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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.