Home / 21,438.72-29,576.88-12,938.58

Finding the Fourth Proportional to 21,438.72, 29,576.88 and 12,938.58

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Solution

The fourth proportional to 21,438.72, 29,576.88 and 12,938.58 is: 17,850.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.72 : 29,576.88 = 12,938.58 : x
  2. Step 2: Convert to fraction form
    21,438.72/29,576.88 = 12,938.58/x
  3. Step 3: Cross multiply
    21,438.72x = 29,576.88 × 12,938.58
  4. Step 4: Simplify right side
    21,438.72x = 382,682,828.03
  5. Step 5: Solve for x
    x = 382,682,828.03/21,438.72
  6. Step 6: Final answer
    x = 17,850.08

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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.