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Finding the Fourth Proportional to 13,316.08, 19,978.11 and 3,956.41

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Solution

The fourth proportional to 13,316.08, 19,978.11 and 3,956.41 is: 5,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,316.08 : 19,978.11 = 3,956.41 : x
  2. Step 2: Convert to fraction form
    13,316.08/19,978.11 = 3,956.41/x
  3. Step 3: Cross multiply
    13,316.08x = 19,978.11 × 3,956.41
  4. Step 4: Simplify right side
    13,316.08x = 79,041,594.19
  5. Step 5: Solve for x
    x = 79,041,594.19/13,316.08
  6. Step 6: Final answer
    x = 5,935.80

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