Home / 21,999.25-30,359.10-12,573.28

Finding the Fourth Proportional to 21,999.25, 30,359.10 and 12,573.28

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Solution

The fourth proportional to 21,999.25, 30,359.10 and 12,573.28 is: 17,351.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.25 : 30,359.10 = 12,573.28 : x
  2. Step 2: Convert to fraction form
    21,999.25/30,359.10 = 12,573.28/x
  3. Step 3: Cross multiply
    21,999.25x = 30,359.10 × 12,573.28
  4. Step 4: Simplify right side
    21,999.25x = 381,713,464.85
  5. Step 5: Solve for x
    x = 381,713,464.85/21,999.25
  6. Step 6: Final answer
    x = 17,351.20

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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.