Home / 21,376.84-29,495.36-12,419.72

Finding the Fourth Proportional to 21,376.84, 29,495.36 and 12,419.72

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Solution

The fourth proportional to 21,376.84, 29,495.36 and 12,419.72 is: 17,136.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,376.84 : 29,495.36 = 12,419.72 : x
  2. Step 2: Convert to fraction form
    21,376.84/29,495.36 = 12,419.72/x
  3. Step 3: Cross multiply
    21,376.84x = 29,495.36 × 12,419.72
  4. Step 4: Simplify right side
    21,376.84x = 366,324,112.50
  5. Step 5: Solve for x
    x = 366,324,112.50/21,376.84
  6. Step 6: Final answer
    x = 17,136.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.