Home / 30,420.41-41,979.72-16,991.87

Finding the Fourth Proportional to 30,420.41, 41,979.72 and 16,991.87

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Solution

The fourth proportional to 30,420.41, 41,979.72 and 16,991.87 is: 23,448.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.41 : 41,979.72 = 16,991.87 : x
  2. Step 2: Convert to fraction form
    30,420.41/41,979.72 = 16,991.87/x
  3. Step 3: Cross multiply
    30,420.41x = 41,979.72 × 16,991.87
  4. Step 4: Simplify right side
    30,420.41x = 713,313,734.98
  5. Step 5: Solve for x
    x = 713,313,734.98/30,420.41
  6. Step 6: Final answer
    x = 23,448.52

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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.