Home / 43,171.92-64,740.84-20,978.73

Finding the Fourth Proportional to 43,171.92, 64,740.84 and 20,978.73

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Solution

The fourth proportional to 43,171.92, 64,740.84 and 20,978.73 is: 31,459.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,171.92 : 64,740.84 = 20,978.73 : x
  2. Step 2: Convert to fraction form
    43,171.92/64,740.84 = 20,978.73/x
  3. Step 3: Cross multiply
    43,171.92x = 64,740.84 × 20,978.73
  4. Step 4: Simplify right side
    43,171.92x = 1,358,180,602.33
  5. Step 5: Solve for x
    x = 1,358,180,602.33/43,171.92
  6. Step 6: Final answer
    x = 31,459.81

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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.