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Finding the Fourth Proportional to 21,326.63, 29,430.86 and 11,766.63

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Solution

The fourth proportional to 21,326.63, 29,430.86 and 11,766.63 is: 16,238.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.63 : 29,430.86 = 11,766.63 : x
  2. Step 2: Convert to fraction form
    21,326.63/29,430.86 = 11,766.63/x
  3. Step 3: Cross multiply
    21,326.63x = 29,430.86 × 11,766.63
  4. Step 4: Simplify right side
    21,326.63x = 346,301,981.37
  5. Step 5: Solve for x
    x = 346,301,981.37/21,326.63
  6. Step 6: Final answer
    x = 16,238.01

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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.