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Finding the Fourth Proportional to 43,338.40, 65,007.60 and 20,010.40

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Solution

The fourth proportional to 43,338.40, 65,007.60 and 20,010.40 is: 30,015.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,338.40 : 65,007.60 = 20,010.40 : x
  2. Step 2: Convert to fraction form
    43,338.40/65,007.60 = 20,010.40/x
  3. Step 3: Cross multiply
    43,338.40x = 65,007.60 × 20,010.40
  4. Step 4: Simplify right side
    43,338.40x = 1,300,828,079.04
  5. Step 5: Solve for x
    x = 1,300,828,079.04/43,338.40
  6. Step 6: Final answer
    x = 30,015.60

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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.