Home / 21,391.85-29,519.10-11,958.59

Finding the Fourth Proportional to 21,391.85, 29,519.10 and 11,958.59

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Solution

The fourth proportional to 21,391.85, 29,519.10 and 11,958.59 is: 16,501.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.85 : 29,519.10 = 11,958.59 : x
  2. Step 2: Convert to fraction form
    21,391.85/29,519.10 = 11,958.59/x
  3. Step 3: Cross multiply
    21,391.85x = 29,519.10 × 11,958.59
  4. Step 4: Simplify right side
    21,391.85x = 353,006,666.47
  5. Step 5: Solve for x
    x = 353,006,666.47/21,391.85
  6. Step 6: Final answer
    x = 16,501.93

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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.