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Finding the Fourth Proportional to 43,451.68, 65,208.60 and 18,509.20

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Solution

The fourth proportional to 43,451.68, 65,208.60 and 18,509.20 is: 27,777.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,451.68 : 65,208.60 = 18,509.20 : x
  2. Step 2: Convert to fraction form
    43,451.68/65,208.60 = 18,509.20/x
  3. Step 3: Cross multiply
    43,451.68x = 65,208.60 × 18,509.20
  4. Step 4: Simplify right side
    43,451.68x = 1,206,959,019.12
  5. Step 5: Solve for x
    x = 1,206,959,019.12/43,451.68
  6. Step 6: Final answer
    x = 27,777.04

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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.