Home / 20,645.71-28,491.20-12,262.03

Finding the Fourth Proportional to 20,645.71, 28,491.20 and 12,262.03

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Solution

The fourth proportional to 20,645.71, 28,491.20 and 12,262.03 is: 16,921.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.71 : 28,491.20 = 12,262.03 : x
  2. Step 2: Convert to fraction form
    20,645.71/28,491.20 = 12,262.03/x
  3. Step 3: Cross multiply
    20,645.71x = 28,491.20 × 12,262.03
  4. Step 4: Simplify right side
    20,645.71x = 349,359,887.83
  5. Step 5: Solve for x
    x = 349,359,887.83/20,645.71
  6. Step 6: Final answer
    x = 16,921.67

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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.