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Finding the Fourth Proportional to 18,666.70, 28,000.05 and 18,537.10

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Solution

The fourth proportional to 18,666.70, 28,000.05 and 18,537.10 is: 27,805.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.70 : 28,000.05 = 18,537.10 : x
  2. Step 2: Convert to fraction form
    18,666.70/28,000.05 = 18,537.10/x
  3. Step 3: Cross multiply
    18,666.70x = 28,000.05 × 18,537.10
  4. Step 4: Simplify right side
    18,666.70x = 519,039,726.86
  5. Step 5: Solve for x
    x = 519,039,726.86/18,666.70
  6. Step 6: Final answer
    x = 27,805.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.