Home / 20,930.66-28,871.50-12,427.01

Finding the Fourth Proportional to 20,930.66, 28,871.50 and 12,427.01

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Solution

The fourth proportional to 20,930.66, 28,871.50 and 12,427.01 is: 17,141.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.66 : 28,871.50 = 12,427.01 : x
  2. Step 2: Convert to fraction form
    20,930.66/28,871.50 = 12,427.01/x
  3. Step 3: Cross multiply
    20,930.66x = 28,871.50 × 12,427.01
  4. Step 4: Simplify right side
    20,930.66x = 358,786,419.22
  5. Step 5: Solve for x
    x = 358,786,419.22/20,930.66
  6. Step 6: Final answer
    x = 17,141.67

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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.