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Finding the Fourth Proportional to 19,216.56, 28,828.31 and 8,691.56

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Solution

The fourth proportional to 19,216.56, 28,828.31 and 8,691.56 is: 13,038.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,216.56 : 28,828.31 = 8,691.56 : x
  2. Step 2: Convert to fraction form
    19,216.56/28,828.31 = 8,691.56/x
  3. Step 3: Cross multiply
    19,216.56x = 28,828.31 × 8,691.56
  4. Step 4: Simplify right side
    19,216.56x = 250,562,955.46
  5. Step 5: Solve for x
    x = 250,562,955.46/19,216.56
  6. Step 6: Final answer
    x = 13,038.91

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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.