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Finding the Fourth Proportional to 14,358.89, 19,812.35 and 8,389.40

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Solution

The fourth proportional to 14,358.89, 19,812.35 and 8,389.40 is: 11,575.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,358.89 : 19,812.35 = 8,389.40 : x
  2. Step 2: Convert to fraction form
    14,358.89/19,812.35 = 8,389.40/x
  3. Step 3: Cross multiply
    14,358.89x = 19,812.35 × 8,389.40
  4. Step 4: Simplify right side
    14,358.89x = 166,213,729.09
  5. Step 5: Solve for x
    x = 166,213,729.09/14,358.89
  6. Step 6: Final answer
    x = 11,575.67

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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.