Home / 15,221.77-20,999.79-9,252.49

Finding the Fourth Proportional to 15,221.77, 20,999.79 and 9,252.49

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Solution

The fourth proportional to 15,221.77, 20,999.79 and 9,252.49 is: 12,764.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.77 : 20,999.79 = 9,252.49 : x
  2. Step 2: Convert to fraction form
    15,221.77/20,999.79 = 9,252.49/x
  3. Step 3: Cross multiply
    15,221.77x = 20,999.79 × 9,252.49
  4. Step 4: Simplify right side
    15,221.77x = 194,300,346.98
  5. Step 5: Solve for x
    x = 194,300,346.98/15,221.77
  6. Step 6: Final answer
    x = 12,764.64

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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.