Home / 21,314.72-29,428.84-13,779.30

Finding the Fourth Proportional to 21,314.72, 29,428.84 and 13,779.30

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Solution

The fourth proportional to 21,314.72, 29,428.84 and 13,779.30 is: 19,024.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.72 : 29,428.84 = 13,779.30 : x
  2. Step 2: Convert to fraction form
    21,314.72/29,428.84 = 13,779.30/x
  3. Step 3: Cross multiply
    21,314.72x = 29,428.84 × 13,779.30
  4. Step 4: Simplify right side
    21,314.72x = 405,508,815.01
  5. Step 5: Solve for x
    x = 405,508,815.01/21,314.72
  6. Step 6: Final answer
    x = 19,024.82

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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.