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Finding the Fourth Proportional to 21,995.80, 30,354.18 and 11,924.20

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Solution

The fourth proportional to 21,995.80, 30,354.18 and 11,924.20 is: 16,455.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.80 : 30,354.18 = 11,924.20 : x
  2. Step 2: Convert to fraction form
    21,995.80/30,354.18 = 11,924.20/x
  3. Step 3: Cross multiply
    21,995.80x = 30,354.18 × 11,924.20
  4. Step 4: Simplify right side
    21,995.80x = 361,949,313.16
  5. Step 5: Solve for x
    x = 361,949,313.16/21,995.80
  6. Step 6: Final answer
    x = 16,455.38

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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.