Home / 20,399.96-28,153.32-12,440

Finding the Fourth Proportional to 20,399.96, 28,153.32 and 12,440

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Solution

The fourth proportional to 20,399.96, 28,153.32 and 12,440 is: 17,168.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.96 : 28,153.32 = 12,440 : x
  2. Step 2: Convert to fraction form
    20,399.96/28,153.32 = 12,440/x
  3. Step 3: Cross multiply
    20,399.96x = 28,153.32 × 12,440
  4. Step 4: Simplify right side
    20,399.96x = 350,227,300.80
  5. Step 5: Solve for x
    x = 350,227,300.80/20,399.96
  6. Step 6: Final answer
    x = 17,168.04

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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.