Home / 20,792.16-31,196-12,478.14

Finding the Fourth Proportional to 20,792.16, 31,196 and 12,478.14

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Solution

The fourth proportional to 20,792.16, 31,196 and 12,478.14 is: 18,721.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.16 : 31,196 = 12,478.14 : x
  2. Step 2: Convert to fraction form
    20,792.16/31,196 = 12,478.14/x
  3. Step 3: Cross multiply
    20,792.16x = 31,196 × 12,478.14
  4. Step 4: Simplify right side
    20,792.16x = 389,268,055.44
  5. Step 5: Solve for x
    x = 389,268,055.44/20,792.16
  6. Step 6: Final answer
    x = 18,721.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.