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Finding the Fourth Proportional to 15,888.18, 21,926.79 and 8,815.26

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Solution

The fourth proportional to 15,888.18, 21,926.79 and 8,815.26 is: 12,165.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,888.18 : 21,926.79 = 8,815.26 : x
  2. Step 2: Convert to fraction form
    15,888.18/21,926.79 = 8,815.26/x
  3. Step 3: Cross multiply
    15,888.18x = 21,926.79 × 8,815.26
  4. Step 4: Simplify right side
    15,888.18x = 193,290,354.82
  5. Step 5: Solve for x
    x = 193,290,354.82/15,888.18
  6. Step 6: Final answer
    x = 12,165.67

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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.