Home / 30,717.62-42,389.89-17,979.56

Finding the Fourth Proportional to 30,717.62, 42,389.89 and 17,979.56

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Solution

The fourth proportional to 30,717.62, 42,389.89 and 17,979.56 is: 24,811.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,717.62 : 42,389.89 = 17,979.56 : x
  2. Step 2: Convert to fraction form
    30,717.62/42,389.89 = 17,979.56/x
  3. Step 3: Cross multiply
    30,717.62x = 42,389.89 × 17,979.56
  4. Step 4: Simplify right side
    30,717.62x = 762,151,313.75
  5. Step 5: Solve for x
    x = 762,151,313.75/30,717.62
  6. Step 6: Final answer
    x = 24,811.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.