Home / 13,456.85-20,172.18-6,435.04

Finding the Fourth Proportional to 13,456.85, 20,172.18 and 6,435.04

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Solution

The fourth proportional to 13,456.85, 20,172.18 and 6,435.04 is: 9,646.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,456.85 : 20,172.18 = 6,435.04 : x
  2. Step 2: Convert to fraction form
    13,456.85/20,172.18 = 6,435.04/x
  3. Step 3: Cross multiply
    13,456.85x = 20,172.18 × 6,435.04
  4. Step 4: Simplify right side
    13,456.85x = 129,808,785.19
  5. Step 5: Solve for x
    x = 129,808,785.19/13,456.85
  6. Step 6: Final answer
    x = 9,646.30

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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.