Home / 21,518.88-29,694.24-13,133.76

Finding the Fourth Proportional to 21,518.88, 29,694.24 and 13,133.76

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Solution

The fourth proportional to 21,518.88, 29,694.24 and 13,133.76 is: 18,123.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.88 : 29,694.24 = 13,133.76 : x
  2. Step 2: Convert to fraction form
    21,518.88/29,694.24 = 13,133.76/x
  3. Step 3: Cross multiply
    21,518.88x = 29,694.24 × 13,133.76
  4. Step 4: Simplify right side
    21,518.88x = 389,997,021.54
  5. Step 5: Solve for x
    x = 389,997,021.54/21,518.88
  6. Step 6: Final answer
    x = 18,123.48

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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.