Home / 30,171.36-45,285.84-18,507.36

Finding the Fourth Proportional to 30,171.36, 45,285.84 and 18,507.36

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Solution

The fourth proportional to 30,171.36, 45,285.84 and 18,507.36 is: 27,778.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,171.36 : 45,285.84 = 18,507.36 : x
  2. Step 2: Convert to fraction form
    30,171.36/45,285.84 = 18,507.36/x
  3. Step 3: Cross multiply
    30,171.36x = 45,285.84 × 18,507.36
  4. Step 4: Simplify right side
    30,171.36x = 838,121,343.78
  5. Step 5: Solve for x
    x = 838,121,343.78/30,171.36
  6. Step 6: Final answer
    x = 27,778.71

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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.