Home / 42,939.28-64,397.24-11,767.12

Finding the Fourth Proportional to 42,939.28, 64,397.24 and 11,767.12

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Solution

The fourth proportional to 42,939.28, 64,397.24 and 11,767.12 is: 17,647.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,939.28 : 64,397.24 = 11,767.12 : x
  2. Step 2: Convert to fraction form
    42,939.28/64,397.24 = 11,767.12/x
  3. Step 3: Cross multiply
    42,939.28x = 64,397.24 × 11,767.12
  4. Step 4: Simplify right side
    42,939.28x = 757,770,050.75
  5. Step 5: Solve for x
    x = 757,770,050.75/42,939.28
  6. Step 6: Final answer
    x = 17,647.48

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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.