Home / 21,315.27-29,415.11-11,883.63

Finding the Fourth Proportional to 21,315.27, 29,415.11 and 11,883.63

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Solution

The fourth proportional to 21,315.27, 29,415.11 and 11,883.63 is: 16,399.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.27 : 29,415.11 = 11,883.63 : x
  2. Step 2: Convert to fraction form
    21,315.27/29,415.11 = 11,883.63/x
  3. Step 3: Cross multiply
    21,315.27x = 29,415.11 × 11,883.63
  4. Step 4: Simplify right side
    21,315.27x = 349,558,224.23
  5. Step 5: Solve for x
    x = 349,558,224.23/21,315.27
  6. Step 6: Final answer
    x = 16,399.43

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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.