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Finding the Fourth Proportional to 19,874.58, 27,425.59 and 10,921.89

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Solution

The fourth proportional to 19,874.58, 27,425.59 and 10,921.89 is: 15,071.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,874.58 : 27,425.59 = 10,921.89 : x
  2. Step 2: Convert to fraction form
    19,874.58/27,425.59 = 10,921.89/x
  3. Step 3: Cross multiply
    19,874.58x = 27,425.59 × 10,921.89
  4. Step 4: Simplify right side
    19,874.58x = 299,539,112.73
  5. Step 5: Solve for x
    x = 299,539,112.73/19,874.58
  6. Step 6: Final answer
    x = 15,071.47

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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.