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Finding the Fourth Proportional to 9,072.90, 12,672.90 and 9,072.90

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Solution

The fourth proportional to 9,072.90, 12,672.90 and 9,072.90 is: 12,672.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,072.90 : 12,672.90 = 9,072.90 : x
  2. Step 2: Convert to fraction form
    9,072.90/12,672.90 = 9,072.90/x
  3. Step 3: Cross multiply
    9,072.90x = 12,672.90 × 9,072.90
  4. Step 4: Simplify right side
    9,072.90x = 114,979,954.41
  5. Step 5: Solve for x
    x = 114,979,954.41/9,072.90
  6. Step 6: Final answer
    x = 12,672.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.