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Finding the Fourth Proportional to 18,907.40, 28,361.10 and 9,576.20

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Solution

The fourth proportional to 18,907.40, 28,361.10 and 9,576.20 is: 14,364.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.40 : 28,361.10 = 9,576.20 : x
  2. Step 2: Convert to fraction form
    18,907.40/28,361.10 = 9,576.20/x
  3. Step 3: Cross multiply
    18,907.40x = 28,361.10 × 9,576.20
  4. Step 4: Simplify right side
    18,907.40x = 271,591,565.82
  5. Step 5: Solve for x
    x = 271,591,565.82/18,907.40
  6. Step 6: Final answer
    x = 14,364.30

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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.