Home / 20,652.78-28,500.75-11,221.41

Finding the Fourth Proportional to 20,652.78, 28,500.75 and 11,221.41

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Solution

The fourth proportional to 20,652.78, 28,500.75 and 11,221.41 is: 15,485.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.78 : 28,500.75 = 11,221.41 : x
  2. Step 2: Convert to fraction form
    20,652.78/28,500.75 = 11,221.41/x
  3. Step 3: Cross multiply
    20,652.78x = 28,500.75 × 11,221.41
  4. Step 4: Simplify right side
    20,652.78x = 319,818,601.06
  5. Step 5: Solve for x
    x = 319,818,601.06/20,652.78
  6. Step 6: Final answer
    x = 15,485.50

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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.