Home / 21,420.72-29,563.38-11,992.32

Finding the Fourth Proportional to 21,420.72, 29,563.38 and 11,992.32

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Solution

The fourth proportional to 21,420.72, 29,563.38 and 11,992.32 is: 16,550.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.72 : 29,563.38 = 11,992.32 : x
  2. Step 2: Convert to fraction form
    21,420.72/29,563.38 = 11,992.32/x
  3. Step 3: Cross multiply
    21,420.72x = 29,563.38 × 11,992.32
  4. Step 4: Simplify right side
    21,420.72x = 354,533,513.24
  5. Step 5: Solve for x
    x = 354,533,513.24/21,420.72
  6. Step 6: Final answer
    x = 16,550.96

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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.