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Finding the Fourth Proportional to 19,143.60, 28,715.40 and 14,769.60

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Solution

The fourth proportional to 19,143.60, 28,715.40 and 14,769.60 is: 22,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,143.60 : 28,715.40 = 14,769.60 : x
  2. Step 2: Convert to fraction form
    19,143.60/28,715.40 = 14,769.60/x
  3. Step 3: Cross multiply
    19,143.60x = 28,715.40 × 14,769.60
  4. Step 4: Simplify right side
    19,143.60x = 424,114,971.84
  5. Step 5: Solve for x
    x = 424,114,971.84/19,143.60
  6. Step 6: Final answer
    x = 22,154.40

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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.