Home / 19,905.51-29,861.69-8,212.35

Finding the Fourth Proportional to 19,905.51, 29,861.69 and 8,212.35

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Solution

The fourth proportional to 19,905.51, 29,861.69 and 8,212.35 is: 12,319.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,905.51 : 29,861.69 = 8,212.35 : x
  2. Step 2: Convert to fraction form
    19,905.51/29,861.69 = 8,212.35/x
  3. Step 3: Cross multiply
    19,905.51x = 29,861.69 × 8,212.35
  4. Step 4: Simplify right side
    19,905.51x = 245,234,608.81
  5. Step 5: Solve for x
    x = 245,234,608.81/19,905.51
  6. Step 6: Final answer
    x = 12,319.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.