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Finding the Fourth Proportional to 28,585.96, 39,407.22 and 19,619.40

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Solution

The fourth proportional to 28,585.96, 39,407.22 and 19,619.40 is: 27,046.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,585.96 : 39,407.22 = 19,619.40 : x
  2. Step 2: Convert to fraction form
    28,585.96/39,407.22 = 19,619.40/x
  3. Step 3: Cross multiply
    28,585.96x = 39,407.22 × 19,619.40
  4. Step 4: Simplify right side
    28,585.96x = 773,146,012.07
  5. Step 5: Solve for x
    x = 773,146,012.07/28,585.96
  6. Step 6: Final answer
    x = 27,046.35

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1.5x scale

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.