Home / 21,391.29-29,519.64-11,830.86

Finding the Fourth Proportional to 21,391.29, 29,519.64 and 11,830.86

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Solution

The fourth proportional to 21,391.29, 29,519.64 and 11,830.86 is: 16,326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.29 : 29,519.64 = 11,830.86 : x
  2. Step 2: Convert to fraction form
    21,391.29/29,519.64 = 11,830.86/x
  3. Step 3: Cross multiply
    21,391.29x = 29,519.64 × 11,830.86
  4. Step 4: Simplify right side
    21,391.29x = 349,242,728.09
  5. Step 5: Solve for x
    x = 349,242,728.09/21,391.29
  6. Step 6: Final answer
    x = 16,326.40

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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.