Home / 21,391.30-29,519.14-11,830.56

Finding the Fourth Proportional to 21,391.30, 29,519.14 and 11,830.56

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Solution

The fourth proportional to 21,391.30, 29,519.14 and 11,830.56 is: 16,325.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.30 : 29,519.14 = 11,830.56 : x
  2. Step 2: Convert to fraction form
    21,391.30/29,519.14 = 11,830.56/x
  3. Step 3: Cross multiply
    21,391.30x = 29,519.14 × 11,830.56
  4. Step 4: Simplify right side
    21,391.30x = 349,227,956.92
  5. Step 5: Solve for x
    x = 349,227,956.92/21,391.30
  6. Step 6: Final answer
    x = 16,325.70

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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.