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Finding the Fourth Proportional to 20,391, 28,186.68 and 17,014.14

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Solution

The fourth proportional to 20,391, 28,186.68 and 17,014.14 is: 23,518.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391 : 28,186.68 = 17,014.14 : x
  2. Step 2: Convert to fraction form
    20,391/28,186.68 = 17,014.14/x
  3. Step 3: Cross multiply
    20,391x = 28,186.68 × 17,014.14
  4. Step 4: Simplify right side
    20,391x = 479,572,119.66
  5. Step 5: Solve for x
    x = 479,572,119.66/20,391
  6. Step 6: Final answer
    x = 23,518.81

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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.