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Finding the Fourth Proportional to 21,726.81, 29,983.01 and 11,790.81

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Solution

The fourth proportional to 21,726.81, 29,983.01 and 11,790.81 is: 16,271.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,726.81 : 29,983.01 = 11,790.81 : x
  2. Step 2: Convert to fraction form
    21,726.81/29,983.01 = 11,790.81/x
  3. Step 3: Cross multiply
    21,726.81x = 29,983.01 × 11,790.81
  4. Step 4: Simplify right side
    21,726.81x = 353,523,974.14
  5. Step 5: Solve for x
    x = 353,523,974.14/21,726.81
  6. Step 6: Final answer
    x = 16,271.32

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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.