Home / 30,420.56-41,979.12-16,991.75

Finding the Fourth Proportional to 30,420.56, 41,979.12 and 16,991.75

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Solution

The fourth proportional to 30,420.56, 41,979.12 and 16,991.75 is: 23,447.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.56 : 41,979.12 = 16,991.75 : x
  2. Step 2: Convert to fraction form
    30,420.56/41,979.12 = 16,991.75/x
  3. Step 3: Cross multiply
    30,420.56x = 41,979.12 × 16,991.75
  4. Step 4: Simplify right side
    30,420.56x = 713,298,712.26
  5. Step 5: Solve for x
    x = 713,298,712.26/30,420.56
  6. Step 6: Final answer
    x = 23,447.92

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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.