Home / 21,100.88-29,123.10-13,556.64

Finding the Fourth Proportional to 21,100.88, 29,123.10 and 13,556.64

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Solution

The fourth proportional to 21,100.88, 29,123.10 and 13,556.64 is: 18,710.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.88 : 29,123.10 = 13,556.64 : x
  2. Step 2: Convert to fraction form
    21,100.88/29,123.10 = 13,556.64/x
  3. Step 3: Cross multiply
    21,100.88x = 29,123.10 × 13,556.64
  4. Step 4: Simplify right side
    21,100.88x = 394,811,236.77
  5. Step 5: Solve for x
    x = 394,811,236.77/21,100.88
  6. Step 6: Final answer
    x = 18,710.66

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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.