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Finding the Fourth Proportional to 43,883.20, 65,749.20 and 20,461.60

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Solution

The fourth proportional to 43,883.20, 65,749.20 and 20,461.60 is: 30,657.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,883.20 : 65,749.20 = 20,461.60 : x
  2. Step 2: Convert to fraction form
    43,883.20/65,749.20 = 20,461.60/x
  3. Step 3: Cross multiply
    43,883.20x = 65,749.20 × 20,461.60
  4. Step 4: Simplify right side
    43,883.20x = 1,345,333,830.72
  5. Step 5: Solve for x
    x = 1,345,333,830.72/43,883.20
  6. Step 6: Final answer
    x = 30,657.15

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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.