Home / 20,864.76-28,796.13-11,910.21

Finding the Fourth Proportional to 20,864.76, 28,796.13 and 11,910.21

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Solution

The fourth proportional to 20,864.76, 28,796.13 and 11,910.21 is: 16,437.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.76 : 28,796.13 = 11,910.21 : x
  2. Step 2: Convert to fraction form
    20,864.76/28,796.13 = 11,910.21/x
  3. Step 3: Cross multiply
    20,864.76x = 28,796.13 × 11,910.21
  4. Step 4: Simplify right side
    20,864.76x = 342,967,955.49
  5. Step 5: Solve for x
    x = 342,967,955.49/20,864.76
  6. Step 6: Final answer
    x = 16,437.67

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Half scale
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Double scale
Find fourth proportional to 20,865.76, 28,797.51 and 11,911.21
Similar ratio
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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.