Home / 20,652.82-28,501.14-11,221.48

Finding the Fourth Proportional to 20,652.82, 28,501.14 and 11,221.48

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Solution

The fourth proportional to 20,652.82, 28,501.14 and 11,221.48 is: 15,485.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.82 : 28,501.14 = 11,221.48 : x
  2. Step 2: Convert to fraction form
    20,652.82/28,501.14 = 11,221.48/x
  3. Step 3: Cross multiply
    20,652.82x = 28,501.14 × 11,221.48
  4. Step 4: Simplify right side
    20,652.82x = 319,824,972.49
  5. Step 5: Solve for x
    x = 319,824,972.49/20,652.82
  6. Step 6: Final answer
    x = 15,485.78

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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.