Home / 21,205.98-29,272.11-18,209.79

Finding the Fourth Proportional to 21,205.98, 29,272.11 and 18,209.79

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Solution

The fourth proportional to 21,205.98, 29,272.11 and 18,209.79 is: 25,136.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.98 : 29,272.11 = 18,209.79 : x
  2. Step 2: Convert to fraction form
    21,205.98/29,272.11 = 18,209.79/x
  3. Step 3: Cross multiply
    21,205.98x = 29,272.11 × 18,209.79
  4. Step 4: Simplify right side
    21,205.98x = 533,038,975.96
  5. Step 5: Solve for x
    x = 533,038,975.96/21,205.98
  6. Step 6: Final answer
    x = 25,136.26

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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.