Home / 20,679.13-28,537.18-11,247.67

Finding the Fourth Proportional to 20,679.13, 28,537.18 and 11,247.67

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Solution

The fourth proportional to 20,679.13, 28,537.18 and 11,247.67 is: 15,521.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.13 : 28,537.18 = 11,247.67 : x
  2. Step 2: Convert to fraction form
    20,679.13/28,537.18 = 11,247.67/x
  3. Step 3: Cross multiply
    20,679.13x = 28,537.18 × 11,247.67
  4. Step 4: Simplify right side
    20,679.13x = 320,976,783.37
  5. Step 5: Solve for x
    x = 320,976,783.37/20,679.13
  6. Step 6: Final answer
    x = 15,521.77

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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.