Home / 21,101.12-29,123.45-13,556.89

Finding the Fourth Proportional to 21,101.12, 29,123.45 and 13,556.89

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Solution

The fourth proportional to 21,101.12, 29,123.45 and 13,556.89 is: 18,711.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.12 : 29,123.45 = 13,556.89 : x
  2. Step 2: Convert to fraction form
    21,101.12/29,123.45 = 13,556.89/x
  3. Step 3: Cross multiply
    21,101.12x = 29,123.45 × 13,556.89
  4. Step 4: Simplify right side
    21,101.12x = 394,823,267.48
  5. Step 5: Solve for x
    x = 394,823,267.48/21,101.12
  6. Step 6: Final answer
    x = 18,711.01

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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.