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Finding the Fourth Proportional to 21,308.66, 29,409.39 and 12,354.41

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Solution

The fourth proportional to 21,308.66, 29,409.39 and 12,354.41 is: 17,051.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.66 : 29,409.39 = 12,354.41 : x
  2. Step 2: Convert to fraction form
    21,308.66/29,409.39 = 12,354.41/x
  3. Step 3: Cross multiply
    21,308.66x = 29,409.39 × 12,354.41
  4. Step 4: Simplify right side
    21,308.66x = 363,335,661.91
  5. Step 5: Solve for x
    x = 363,335,661.91/21,308.66
  6. Step 6: Final answer
    x = 17,051.08

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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.