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Finding the Fourth Proportional to 21,071.67, 31,616.01 and 9,376.89

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Solution

The fourth proportional to 21,071.67, 31,616.01 and 9,376.89 is: 14,069.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.67 : 31,616.01 = 9,376.89 : x
  2. Step 2: Convert to fraction form
    21,071.67/31,616.01 = 9,376.89/x
  3. Step 3: Cross multiply
    21,071.67x = 31,616.01 × 9,376.89
  4. Step 4: Simplify right side
    21,071.67x = 296,459,848.01
  5. Step 5: Solve for x
    x = 296,459,848.01/21,071.67
  6. Step 6: Final answer
    x = 14,069.12

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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.