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Finding the Fourth Proportional to 28,372.28, 42,557.94 and 7,312.28

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Solution

The fourth proportional to 28,372.28, 42,557.94 and 7,312.28 is: 10,968.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,372.28 : 42,557.94 = 7,312.28 : x
  2. Step 2: Convert to fraction form
    28,372.28/42,557.94 = 7,312.28/x
  3. Step 3: Cross multiply
    28,372.28x = 42,557.94 × 7,312.28
  4. Step 4: Simplify right side
    28,372.28x = 311,195,360.71
  5. Step 5: Solve for x
    x = 311,195,360.71/28,372.28
  6. Step 6: Final answer
    x = 10,968.29

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