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Finding the Fourth Proportional to 19,011.49, 28,514.80 and 7,916.11

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Solution

The fourth proportional to 19,011.49, 28,514.80 and 7,916.11 is: 11,873.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,011.49 : 28,514.80 = 7,916.11 : x
  2. Step 2: Convert to fraction form
    19,011.49/28,514.80 = 7,916.11/x
  3. Step 3: Cross multiply
    19,011.49x = 28,514.80 × 7,916.11
  4. Step 4: Simplify right side
    19,011.49x = 225,726,293.43
  5. Step 5: Solve for x
    x = 225,726,293.43/19,011.49
  6. Step 6: Final answer
    x = 11,873.15

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1.5x scale

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.