Home / 21,979.63-30,331.85-11,908.32

Finding the Fourth Proportional to 21,979.63, 30,331.85 and 11,908.32

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Solution

The fourth proportional to 21,979.63, 30,331.85 and 11,908.32 is: 16,433.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.63 : 30,331.85 = 11,908.32 : x
  2. Step 2: Convert to fraction form
    21,979.63/30,331.85 = 11,908.32/x
  3. Step 3: Cross multiply
    21,979.63x = 30,331.85 × 11,908.32
  4. Step 4: Simplify right side
    21,979.63x = 361,201,440.31
  5. Step 5: Solve for x
    x = 361,201,440.31/21,979.63
  6. Step 6: Final answer
    x = 16,433.46

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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.