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Finding the Fourth Proportional to 20,363.59, 30,457.90 and 18,127.99

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Solution

The fourth proportional to 20,363.59, 30,457.90 and 18,127.99 is: 27,114.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,363.59 : 30,457.90 = 18,127.99 : x
  2. Step 2: Convert to fraction form
    20,363.59/30,457.90 = 18,127.99/x
  3. Step 3: Cross multiply
    20,363.59x = 30,457.90 × 18,127.99
  4. Step 4: Simplify right side
    20,363.59x = 552,140,506.62
  5. Step 5: Solve for x
    x = 552,140,506.62/20,363.59
  6. Step 6: Final answer
    x = 27,114.10

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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.