Home / 21,031.82-29,023.66-11,471.68

Finding the Fourth Proportional to 21,031.82, 29,023.66 and 11,471.68

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Solution

The fourth proportional to 21,031.82, 29,023.66 and 11,471.68 is: 15,830.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.82 : 29,023.66 = 11,471.68 : x
  2. Step 2: Convert to fraction form
    21,031.82/29,023.66 = 11,471.68/x
  3. Step 3: Cross multiply
    21,031.82x = 29,023.66 × 11,471.68
  4. Step 4: Simplify right side
    21,031.82x = 332,950,139.95
  5. Step 5: Solve for x
    x = 332,950,139.95/21,031.82
  6. Step 6: Final answer
    x = 15,830.78

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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.