Home / 20,431.37-28,196.03-11,478.69

Finding the Fourth Proportional to 20,431.37, 28,196.03 and 11,478.69

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Solution

The fourth proportional to 20,431.37, 28,196.03 and 11,478.69 is: 15,841.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.37 : 28,196.03 = 11,478.69 : x
  2. Step 2: Convert to fraction form
    20,431.37/28,196.03 = 11,478.69/x
  3. Step 3: Cross multiply
    20,431.37x = 28,196.03 × 11,478.69
  4. Step 4: Simplify right side
    20,431.37x = 323,653,516.30
  5. Step 5: Solve for x
    x = 323,653,516.30/20,431.37
  6. Step 6: Final answer
    x = 15,841.01

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Half scale
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Double scale
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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.