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Finding the Fourth Proportional to 21,852.91, 30,084.12 and 20,848.68

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Solution

The fourth proportional to 21,852.91, 30,084.12 and 20,848.68 is: 28,701.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.91 : 30,084.12 = 20,848.68 : x
  2. Step 2: Convert to fraction form
    21,852.91/30,084.12 = 20,848.68/x
  3. Step 3: Cross multiply
    21,852.91x = 30,084.12 × 20,848.68
  4. Step 4: Simplify right side
    21,852.91x = 627,214,190.96
  5. Step 5: Solve for x
    x = 627,214,190.96/21,852.91
  6. Step 6: Final answer
    x = 28,701.63

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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.