Home / 21,438.54-29,584.47-11,878.02

Finding the Fourth Proportional to 21,438.54, 29,584.47 and 11,878.02

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Solution

The fourth proportional to 21,438.54, 29,584.47 and 11,878.02 is: 16,391.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.54 : 29,584.47 = 11,878.02 : x
  2. Step 2: Convert to fraction form
    21,438.54/29,584.47 = 11,878.02/x
  3. Step 3: Cross multiply
    21,438.54x = 29,584.47 × 11,878.02
  4. Step 4: Simplify right side
    21,438.54x = 351,404,926.35
  5. Step 5: Solve for x
    x = 351,404,926.35/21,438.54
  6. Step 6: Final answer
    x = 16,391.27

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1.5x scale

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.