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Finding the Fourth Proportional to 28,396.96, 39,187.90 and 17,066.68

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Solution

The fourth proportional to 28,396.96, 39,187.90 and 17,066.68 is: 23,552.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396.96 : 39,187.90 = 17,066.68 : x
  2. Step 2: Convert to fraction form
    28,396.96/39,187.90 = 17,066.68/x
  3. Step 3: Cross multiply
    28,396.96x = 39,187.90 × 17,066.68
  4. Step 4: Simplify right side
    28,396.96x = 668,807,349.17
  5. Step 5: Solve for x
    x = 668,807,349.17/28,396.96
  6. Step 6: Final answer
    x = 23,552.08

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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.