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Finding the Fourth Proportional to 28,691.49, 39,590.73 and 16,746.15

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Solution

The fourth proportional to 28,691.49, 39,590.73 and 16,746.15 is: 23,107.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.49 : 39,590.73 = 16,746.15 : x
  2. Step 2: Convert to fraction form
    28,691.49/39,590.73 = 16,746.15/x
  3. Step 3: Cross multiply
    28,691.49x = 39,590.73 × 16,746.15
  4. Step 4: Simplify right side
    28,691.49x = 662,992,303.19
  5. Step 5: Solve for x
    x = 662,992,303.19/28,691.49
  6. Step 6: Final answer
    x = 23,107.63

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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.