Home / 30,420.10-41,979.36-16,991.92

Finding the Fourth Proportional to 30,420.10, 41,979.36 and 16,991.92

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Solution

The fourth proportional to 30,420.10, 41,979.36 and 16,991.92 is: 23,448.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.10 : 41,979.36 = 16,991.92 : x
  2. Step 2: Convert to fraction form
    30,420.10/41,979.36 = 16,991.92/x
  3. Step 3: Cross multiply
    30,420.10x = 41,979.36 × 16,991.92
  4. Step 4: Simplify right side
    30,420.10x = 713,309,821.82
  5. Step 5: Solve for x
    x = 713,309,821.82/30,420.10
  6. Step 6: Final answer
    x = 23,448.64

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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.