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Finding the Fourth Proportional to 13,155, 19,742.22 and 6,229.50

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Solution

The fourth proportional to 13,155, 19,742.22 and 6,229.50 is: 9,348.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155 : 19,742.22 = 6,229.50 : x
  2. Step 2: Convert to fraction form
    13,155/19,742.22 = 6,229.50/x
  3. Step 3: Cross multiply
    13,155x = 19,742.22 × 6,229.50
  4. Step 4: Simplify right side
    13,155x = 122,984,159.49
  5. Step 5: Solve for x
    x = 122,984,159.49/13,155
  6. Step 6: Final answer
    x = 9,348.85

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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.