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Finding the Fourth Proportional to 21,663.66, 29,866.86 and 19,449.33

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Solution

The fourth proportional to 21,663.66, 29,866.86 and 19,449.33 is: 26,814.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.66 : 29,866.86 = 19,449.33 : x
  2. Step 2: Convert to fraction form
    21,663.66/29,866.86 = 19,449.33/x
  3. Step 3: Cross multiply
    21,663.66x = 29,866.86 × 19,449.33
  4. Step 4: Simplify right side
    21,663.66x = 580,890,304.20
  5. Step 5: Solve for x
    x = 580,890,304.20/21,663.66
  6. Step 6: Final answer
    x = 26,814.04

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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.