Home / 20,431.01-28,196-15,386.33

Finding the Fourth Proportional to 20,431.01, 28,196 and 15,386.33

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Solution

The fourth proportional to 20,431.01, 28,196 and 15,386.33 is: 21,234.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.01 : 28,196 = 15,386.33 : x
  2. Step 2: Convert to fraction form
    20,431.01/28,196 = 15,386.33/x
  3. Step 3: Cross multiply
    20,431.01x = 28,196 × 15,386.33
  4. Step 4: Simplify right side
    20,431.01x = 433,832,960.68
  5. Step 5: Solve for x
    x = 433,832,960.68/20,431.01
  6. Step 6: Final answer
    x = 21,234.04

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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.