Home / 13,612.45-20,420.49-4,253.11

Finding the Fourth Proportional to 13,612.45, 20,420.49 and 4,253.11

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Solution

The fourth proportional to 13,612.45, 20,420.49 and 4,253.11 is: 6,380.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.45 : 20,420.49 = 4,253.11 : x
  2. Step 2: Convert to fraction form
    13,612.45/20,420.49 = 4,253.11/x
  3. Step 3: Cross multiply
    13,612.45x = 20,420.49 × 4,253.11
  4. Step 4: Simplify right side
    13,612.45x = 86,850,590.22
  5. Step 5: Solve for x
    x = 86,850,590.22/13,612.45
  6. Step 6: Final answer
    x = 6,380.23

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1.5x scale

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.