Home / 8,638.24-11,920.62-4,861.40

Finding the Fourth Proportional to 8,638.24, 11,920.62 and 4,861.40

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Solution

The fourth proportional to 8,638.24, 11,920.62 and 4,861.40 is: 6,708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.24 : 11,920.62 = 4,861.40 : x
  2. Step 2: Convert to fraction form
    8,638.24/11,920.62 = 4,861.40/x
  3. Step 3: Cross multiply
    8,638.24x = 11,920.62 × 4,861.40
  4. Step 4: Simplify right side
    8,638.24x = 57,950,902.07
  5. Step 5: Solve for x
    x = 57,950,902.07/8,638.24
  6. Step 6: Final answer
    x = 6,708.65

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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.