Home / 21,113.95-29,136.80-11,553.80

Finding the Fourth Proportional to 21,113.95, 29,136.80 and 11,553.80

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Solution

The fourth proportional to 21,113.95, 29,136.80 and 11,553.80 is: 15,943.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.95 : 29,136.80 = 11,553.80 : x
  2. Step 2: Convert to fraction form
    21,113.95/29,136.80 = 11,553.80/x
  3. Step 3: Cross multiply
    21,113.95x = 29,136.80 × 11,553.80
  4. Step 4: Simplify right side
    21,113.95x = 336,640,556.39
  5. Step 5: Solve for x
    x = 336,640,556.39/21,113.95
  6. Step 6: Final answer
    x = 15,943.99

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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.