Home / 21,519.77-29,696.90-13,136.27

Finding the Fourth Proportional to 21,519.77, 29,696.90 and 13,136.27

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Solution

The fourth proportional to 21,519.77, 29,696.90 and 13,136.27 is: 18,127.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,519.77 : 29,696.90 = 13,136.27 : x
  2. Step 2: Convert to fraction form
    21,519.77/29,696.90 = 13,136.27/x
  3. Step 3: Cross multiply
    21,519.77x = 29,696.90 × 13,136.27
  4. Step 4: Simplify right side
    21,519.77x = 390,106,282.40
  5. Step 5: Solve for x
    x = 390,106,282.40/21,519.77
  6. Step 6: Final answer
    x = 18,127.81

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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.