Home / 20,765.22-28,659.29-13,203.67

Finding the Fourth Proportional to 20,765.22, 28,659.29 and 13,203.67

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Solution

The fourth proportional to 20,765.22, 28,659.29 and 13,203.67 is: 18,223.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.22 : 28,659.29 = 13,203.67 : x
  2. Step 2: Convert to fraction form
    20,765.22/28,659.29 = 13,203.67/x
  3. Step 3: Cross multiply
    20,765.22x = 28,659.29 × 13,203.67
  4. Step 4: Simplify right side
    20,765.22x = 378,407,807.59
  5. Step 5: Solve for x
    x = 378,407,807.59/20,765.22
  6. Step 6: Final answer
    x = 18,223.15

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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.