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Finding the Fourth Proportional to 20,068, 27,659.28 and 18,864.16

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Solution

The fourth proportional to 20,068, 27,659.28 and 18,864.16 is: 26,000.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,068 : 27,659.28 = 18,864.16 : x
  2. Step 2: Convert to fraction form
    20,068/27,659.28 = 18,864.16/x
  3. Step 3: Cross multiply
    20,068x = 27,659.28 × 18,864.16
  4. Step 4: Simplify right side
    20,068x = 521,769,083.40
  5. Step 5: Solve for x
    x = 521,769,083.40/20,068
  6. Step 6: Final answer
    x = 26,000.05

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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.