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Finding the Fourth Proportional to 43,678.80, 65,518.20 and 20,350.80

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Solution

The fourth proportional to 43,678.80, 65,518.20 and 20,350.80 is: 30,526.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,678.80 : 65,518.20 = 20,350.80 : x
  2. Step 2: Convert to fraction form
    43,678.80/65,518.20 = 20,350.80/x
  3. Step 3: Cross multiply
    43,678.80x = 65,518.20 × 20,350.80
  4. Step 4: Simplify right side
    43,678.80x = 1,333,347,784.56
  5. Step 5: Solve for x
    x = 1,333,347,784.56/43,678.80
  6. Step 6: Final answer
    x = 30,526.20

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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.