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Finding the Fourth Proportional to 30,745.44, 42,392.88 and 21,523.68

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Solution

The fourth proportional to 30,745.44, 42,392.88 and 21,523.68 is: 29,677.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,745.44 : 42,392.88 = 21,523.68 : x
  2. Step 2: Convert to fraction form
    30,745.44/42,392.88 = 21,523.68/x
  3. Step 3: Cross multiply
    30,745.44x = 42,392.88 × 21,523.68
  4. Step 4: Simplify right side
    30,745.44x = 912,450,783.40
  5. Step 5: Solve for x
    x = 912,450,783.40/30,745.44
  6. Step 6: Final answer
    x = 29,677.60

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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.