Home / 21,429.83-29,576.66-12,815.45

Finding the Fourth Proportional to 21,429.83, 29,576.66 and 12,815.45

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Solution

The fourth proportional to 21,429.83, 29,576.66 and 12,815.45 is: 17,687.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.83 : 29,576.66 = 12,815.45 : x
  2. Step 2: Convert to fraction form
    21,429.83/29,576.66 = 12,815.45/x
  3. Step 3: Cross multiply
    21,429.83x = 29,576.66 × 12,815.45
  4. Step 4: Simplify right side
    21,429.83x = 379,038,091.55
  5. Step 5: Solve for x
    x = 379,038,091.55/21,429.83
  6. Step 6: Final answer
    x = 17,687.41

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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.