Home / 30,420.07-41,979.25-16,991.51

Finding the Fourth Proportional to 30,420.07, 41,979.25 and 16,991.51

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Solution

The fourth proportional to 30,420.07, 41,979.25 and 16,991.51 is: 23,448.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.07 : 41,979.25 = 16,991.51 : x
  2. Step 2: Convert to fraction form
    30,420.07/41,979.25 = 16,991.51/x
  3. Step 3: Cross multiply
    30,420.07x = 41,979.25 × 16,991.51
  4. Step 4: Simplify right side
    30,420.07x = 713,290,761.21
  5. Step 5: Solve for x
    x = 713,290,761.21/30,420.07
  6. Step 6: Final answer
    x = 23,448.04

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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.