Home / 42,928.89-64,400.24-20,743.90

Finding the Fourth Proportional to 42,928.89, 64,400.24 and 20,743.90

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Solution

The fourth proportional to 42,928.89, 64,400.24 and 20,743.90 is: 31,119.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,928.89 : 64,400.24 = 20,743.90 : x
  2. Step 2: Convert to fraction form
    42,928.89/64,400.24 = 20,743.90/x
  3. Step 3: Cross multiply
    42,928.89x = 64,400.24 × 20,743.90
  4. Step 4: Simplify right side
    42,928.89x = 1,335,912,029.40
  5. Step 5: Solve for x
    x = 1,335,912,029.40/42,928.89
  6. Step 6: Final answer
    x = 31,119.18

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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.