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Finding the Fourth Proportional to 11,726.12, 16,182.05 and 6,420.93

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Solution

The fourth proportional to 11,726.12, 16,182.05 and 6,420.93 is: 8,860.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,726.12 : 16,182.05 = 6,420.93 : x
  2. Step 2: Convert to fraction form
    11,726.12/16,182.05 = 6,420.93/x
  3. Step 3: Cross multiply
    11,726.12x = 16,182.05 × 6,420.93
  4. Step 4: Simplify right side
    11,726.12x = 103,903,778.20
  5. Step 5: Solve for x
    x = 103,903,778.20/11,726.12
  6. Step 6: Final answer
    x = 8,860.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.