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Finding the Fourth Proportional to 19,143.24, 28,674.30 and 15,425.40

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Solution

The fourth proportional to 19,143.24, 28,674.30 and 15,425.40 is: 23,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,143.24 : 28,674.30 = 15,425.40 : x
  2. Step 2: Convert to fraction form
    19,143.24/28,674.30 = 15,425.40/x
  3. Step 3: Cross multiply
    19,143.24x = 28,674.30 × 15,425.40
  4. Step 4: Simplify right side
    19,143.24x = 442,312,547.22
  5. Step 5: Solve for x
    x = 442,312,547.22/19,143.24
  6. Step 6: Final answer
    x = 23,105.42

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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.