Home / 42,928.64-64,399.87-20,743.65

Finding the Fourth Proportional to 42,928.64, 64,399.87 and 20,743.65

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Solution

The fourth proportional to 42,928.64, 64,399.87 and 20,743.65 is: 31,118.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,928.64 : 64,399.87 = 20,743.65 : x
  2. Step 2: Convert to fraction form
    42,928.64/64,399.87 = 20,743.65/x
  3. Step 3: Cross multiply
    42,928.64x = 64,399.87 × 20,743.65
  4. Step 4: Simplify right side
    42,928.64x = 1,335,888,150.47
  5. Step 5: Solve for x
    x = 1,335,888,150.47/42,928.64
  6. Step 6: Final answer
    x = 31,118.81

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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.