Home / 21,438.58-29,583.98-11,878.42

Finding the Fourth Proportional to 21,438.58, 29,583.98 and 11,878.42

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Solution

The fourth proportional to 21,438.58, 29,583.98 and 11,878.42 is: 16,391.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.58 : 29,583.98 = 11,878.42 : x
  2. Step 2: Convert to fraction form
    21,438.58/29,583.98 = 11,878.42/x
  3. Step 3: Cross multiply
    21,438.58x = 29,583.98 × 11,878.42
  4. Step 4: Simplify right side
    21,438.58x = 351,410,939.71
  5. Step 5: Solve for x
    x = 351,410,939.71/21,438.58
  6. Step 6: Final answer
    x = 16,391.52

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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.