Home / 20,427.17-28,201.31-13,365.90

Finding the Fourth Proportional to 20,427.17, 28,201.31 and 13,365.90

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Solution

The fourth proportional to 20,427.17, 28,201.31 and 13,365.90 is: 18,452.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.17 : 28,201.31 = 13,365.90 : x
  2. Step 2: Convert to fraction form
    20,427.17/28,201.31 = 13,365.90/x
  3. Step 3: Cross multiply
    20,427.17x = 28,201.31 × 13,365.90
  4. Step 4: Simplify right side
    20,427.17x = 376,935,822.50
  5. Step 5: Solve for x
    x = 376,935,822.50/20,427.17
  6. Step 6: Final answer
    x = 18,452.67

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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.