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Finding the Fourth Proportional to 43,353.95, 65,030.91 and 12,189.20

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Solution

The fourth proportional to 43,353.95, 65,030.91 and 12,189.20 is: 18,283.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,353.95 : 65,030.91 = 12,189.20 : x
  2. Step 2: Convert to fraction form
    43,353.95/65,030.91 = 12,189.20/x
  3. Step 3: Cross multiply
    43,353.95x = 65,030.91 × 12,189.20
  4. Step 4: Simplify right side
    43,353.95x = 792,674,443.02
  5. Step 5: Solve for x
    x = 792,674,443.02/43,353.95
  6. Step 6: Final answer
    x = 18,283.79

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Similar ratio
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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.