Home / 19,899.84-29,820.60-8,221.26

Finding the Fourth Proportional to 19,899.84, 29,820.60 and 8,221.26

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Solution

The fourth proportional to 19,899.84, 29,820.60 and 8,221.26 is: 12,319.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,899.84 : 29,820.60 = 8,221.26 : x
  2. Step 2: Convert to fraction form
    19,899.84/29,820.60 = 8,221.26/x
  3. Step 3: Cross multiply
    19,899.84x = 29,820.60 × 8,221.26
  4. Step 4: Simplify right side
    19,899.84x = 245,162,905.96
  5. Step 5: Solve for x
    x = 245,162,905.96/19,899.84
  6. Step 6: Final answer
    x = 12,319.84

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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.