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Finding the Fourth Proportional to 18,894.59, 26,078.14 and 12,509.92

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Solution

The fourth proportional to 18,894.59, 26,078.14 and 12,509.92 is: 17,266.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894.59 : 26,078.14 = 12,509.92 : x
  2. Step 2: Convert to fraction form
    18,894.59/26,078.14 = 12,509.92/x
  3. Step 3: Cross multiply
    18,894.59x = 26,078.14 × 12,509.92
  4. Step 4: Simplify right side
    18,894.59x = 326,235,445.15
  5. Step 5: Solve for x
    x = 326,235,445.15/18,894.59
  6. Step 6: Final answer
    x = 17,266.08

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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.