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Finding the Fourth Proportional to 21,326.66, 29,430.84 and 11,895.84

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Solution

The fourth proportional to 21,326.66, 29,430.84 and 11,895.84 is: 16,416.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.66 : 29,430.84 = 11,895.84 : x
  2. Step 2: Convert to fraction form
    21,326.66/29,430.84 = 11,895.84/x
  3. Step 3: Cross multiply
    21,326.66x = 29,430.84 × 11,895.84
  4. Step 4: Simplify right side
    21,326.66x = 350,104,563.71
  5. Step 5: Solve for x
    x = 350,104,563.71/21,326.66
  6. Step 6: Final answer
    x = 16,416.29

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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.