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Finding the Fourth Proportional to 18,919.17, 28,515.51 and 17,847.54

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Solution

The fourth proportional to 18,919.17, 28,515.51 and 17,847.54 is: 26,900.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.17 : 28,515.51 = 17,847.54 : x
  2. Step 2: Convert to fraction form
    18,919.17/28,515.51 = 17,847.54/x
  3. Step 3: Cross multiply
    18,919.17x = 28,515.51 × 17,847.54
  4. Step 4: Simplify right side
    18,919.17x = 508,931,705.35
  5. Step 5: Solve for x
    x = 508,931,705.35/18,919.17
  6. Step 6: Final answer
    x = 26,900.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.