Home / 8,138.40-11,229.66-4,780.50

Finding the Fourth Proportional to 8,138.40, 11,229.66 and 4,780.50

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Solution

The fourth proportional to 8,138.40, 11,229.66 and 4,780.50 is: 6,596.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.40 : 11,229.66 = 4,780.50 : x
  2. Step 2: Convert to fraction form
    8,138.40/11,229.66 = 4,780.50/x
  3. Step 3: Cross multiply
    8,138.40x = 11,229.66 × 4,780.50
  4. Step 4: Simplify right side
    8,138.40x = 53,683,389.63
  5. Step 5: Solve for x
    x = 53,683,389.63/8,138.40
  6. Step 6: Final answer
    x = 6,596.31

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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.