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Finding the Fourth Proportional to 20,615.04, 30,922.56 and 8,928

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Solution

The fourth proportional to 20,615.04, 30,922.56 and 8,928 is: 13,392

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.04 : 30,922.56 = 8,928 : x
  2. Step 2: Convert to fraction form
    20,615.04/30,922.56 = 8,928/x
  3. Step 3: Cross multiply
    20,615.04x = 30,922.56 × 8,928
  4. Step 4: Simplify right side
    20,615.04x = 276,076,615.68
  5. Step 5: Solve for x
    x = 276,076,615.68/20,615.04
  6. Step 6: Final answer
    x = 13,392

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.