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Finding the Fourth Proportional to 30,620.40, 45,919.80 and 10,899.60

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Solution

The fourth proportional to 30,620.40, 45,919.80 and 10,899.60 is: 16,345.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,620.40 : 45,919.80 = 10,899.60 : x
  2. Step 2: Convert to fraction form
    30,620.40/45,919.80 = 10,899.60/x
  3. Step 3: Cross multiply
    30,620.40x = 45,919.80 × 10,899.60
  4. Step 4: Simplify right side
    30,620.40x = 500,507,452.08
  5. Step 5: Solve for x
    x = 500,507,452.08/30,620.40
  6. Step 6: Final answer
    x = 16,345.56

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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.