Home / 30,443.57-45,665.32-19,979.79

Finding the Fourth Proportional to 30,443.57, 45,665.32 and 19,979.79

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Solution

The fourth proportional to 30,443.57, 45,665.32 and 19,979.79 is: 29,969.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,443.57 : 45,665.32 = 19,979.79 : x
  2. Step 2: Convert to fraction form
    30,443.57/45,665.32 = 19,979.79/x
  3. Step 3: Cross multiply
    30,443.57x = 45,665.32 × 19,979.79
  4. Step 4: Simplify right side
    30,443.57x = 912,383,503.88
  5. Step 5: Solve for x
    x = 912,383,503.88/30,443.57
  6. Step 6: Final answer
    x = 29,969.66

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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.