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Finding the Fourth Proportional to 21,234.51, 31,876.38 and 11,393.01

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Solution

The fourth proportional to 21,234.51, 31,876.38 and 11,393.01 is: 17,102.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.51 : 31,876.38 = 11,393.01 : x
  2. Step 2: Convert to fraction form
    21,234.51/31,876.38 = 11,393.01/x
  3. Step 3: Cross multiply
    21,234.51x = 31,876.38 × 11,393.01
  4. Step 4: Simplify right side
    21,234.51x = 363,167,916.10
  5. Step 5: Solve for x
    x = 363,167,916.10/21,234.51
  6. Step 6: Final answer
    x = 17,102.72

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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.