Home / 13,830.12-20,739.78-6,433.20

Finding the Fourth Proportional to 13,830.12, 20,739.78 and 6,433.20

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Solution

The fourth proportional to 13,830.12, 20,739.78 and 6,433.20 is: 9,647.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830.12 : 20,739.78 = 6,433.20 : x
  2. Step 2: Convert to fraction form
    13,830.12/20,739.78 = 6,433.20/x
  3. Step 3: Cross multiply
    13,830.12x = 20,739.78 × 6,433.20
  4. Step 4: Simplify right side
    13,830.12x = 133,423,152.70
  5. Step 5: Solve for x
    x = 133,423,152.70/13,830.12
  6. Step 6: Final answer
    x = 9,647.29

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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.