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Finding the Fourth Proportional to 18,913.90, 26,101.82 and 10,416.92

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Solution

The fourth proportional to 18,913.90, 26,101.82 and 10,416.92 is: 14,375.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.90 : 26,101.82 = 10,416.92 : x
  2. Step 2: Convert to fraction form
    18,913.90/26,101.82 = 10,416.92/x
  3. Step 3: Cross multiply
    18,913.90x = 26,101.82 × 10,416.92
  4. Step 4: Simplify right side
    18,913.90x = 271,900,570.79
  5. Step 5: Solve for x
    x = 271,900,570.79/18,913.90
  6. Step 6: Final answer
    x = 14,375.70

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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.