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Finding the Fourth Proportional to 19,012.51, 28,526.06 and 7,916.22

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Solution

The fourth proportional to 19,012.51, 28,526.06 and 7,916.22 is: 11,877.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,012.51 : 28,526.06 = 7,916.22 : x
  2. Step 2: Convert to fraction form
    19,012.51/28,526.06 = 7,916.22/x
  3. Step 3: Cross multiply
    19,012.51x = 28,526.06 × 7,916.22
  4. Step 4: Simplify right side
    19,012.51x = 225,818,566.69
  5. Step 5: Solve for x
    x = 225,818,566.69/19,012.51
  6. Step 6: Final answer
    x = 11,877.37

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Why These Related Problems?

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