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Finding the Fourth Proportional to 19,156.41, 26,439.48 and 11,989.65

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Solution

The fourth proportional to 19,156.41, 26,439.48 and 11,989.65 is: 16,547.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,156.41 : 26,439.48 = 11,989.65 : x
  2. Step 2: Convert to fraction form
    19,156.41/26,439.48 = 11,989.65/x
  3. Step 3: Cross multiply
    19,156.41x = 26,439.48 × 11,989.65
  4. Step 4: Simplify right side
    19,156.41x = 317,000,111.38
  5. Step 5: Solve for x
    x = 317,000,111.38/19,156.41
  6. Step 6: Final answer
    x = 16,547.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.