Home / 21,131.34-29,136.11-13,577.99

Finding the Fourth Proportional to 21,131.34, 29,136.11 and 13,577.99

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Solution

The fourth proportional to 21,131.34, 29,136.11 and 13,577.99 is: 18,721.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.34 : 29,136.11 = 13,577.99 : x
  2. Step 2: Convert to fraction form
    21,131.34/29,136.11 = 13,577.99/x
  3. Step 3: Cross multiply
    21,131.34x = 29,136.11 × 13,577.99
  4. Step 4: Simplify right side
    21,131.34x = 395,609,596.65
  5. Step 5: Solve for x
    x = 395,609,596.65/21,131.34
  6. Step 6: Final answer
    x = 18,721.46

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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.