Home / 21,617.39-29,836.64-13,654.55

Finding the Fourth Proportional to 21,617.39, 29,836.64 and 13,654.55

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Solution

The fourth proportional to 21,617.39, 29,836.64 and 13,654.55 is: 18,846.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.39 : 29,836.64 = 13,654.55 : x
  2. Step 2: Convert to fraction form
    21,617.39/29,836.64 = 13,654.55/x
  3. Step 3: Cross multiply
    21,617.39x = 29,836.64 × 13,654.55
  4. Step 4: Simplify right side
    21,617.39x = 407,405,824.44
  5. Step 5: Solve for x
    x = 407,405,824.44/21,617.39
  6. Step 6: Final answer
    x = 18,846.21

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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.