Home / 21,121.48-29,134.96-13,951.48

Finding the Fourth Proportional to 21,121.48, 29,134.96 and 13,951.48

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Solution

The fourth proportional to 21,121.48, 29,134.96 and 13,951.48 is: 19,244.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.48 : 29,134.96 = 13,951.48 : x
  2. Step 2: Convert to fraction form
    21,121.48/29,134.96 = 13,951.48/x
  3. Step 3: Cross multiply
    21,121.48x = 29,134.96 × 13,951.48
  4. Step 4: Simplify right side
    21,121.48x = 406,475,811.74
  5. Step 5: Solve for x
    x = 406,475,811.74/21,121.48
  6. Step 6: Final answer
    x = 19,244.67

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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.