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Finding the Fourth Proportional to 18,731.68, 28,076.88 and 9,361.12

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Solution

The fourth proportional to 18,731.68, 28,076.88 and 9,361.12 is: 14,031.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.68 : 28,076.88 = 9,361.12 : x
  2. Step 2: Convert to fraction form
    18,731.68/28,076.88 = 9,361.12/x
  3. Step 3: Cross multiply
    18,731.68x = 28,076.88 × 9,361.12
  4. Step 4: Simplify right side
    18,731.68x = 262,831,042.91
  5. Step 5: Solve for x
    x = 262,831,042.91/18,731.68
  6. Step 6: Final answer
    x = 14,031.37

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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.