Home / 21,406.99-29,540.92-11,847.28

Finding the Fourth Proportional to 21,406.99, 29,540.92 and 11,847.28

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Solution

The fourth proportional to 21,406.99, 29,540.92 and 11,847.28 is: 16,348.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.99 : 29,540.92 = 11,847.28 : x
  2. Step 2: Convert to fraction form
    21,406.99/29,540.92 = 11,847.28/x
  3. Step 3: Cross multiply
    21,406.99x = 29,540.92 × 11,847.28
  4. Step 4: Simplify right side
    21,406.99x = 349,979,491.46
  5. Step 5: Solve for x
    x = 349,979,491.46/21,406.99
  6. Step 6: Final answer
    x = 16,348.84

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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.