Home / 12,420.40-18,628.80-3,654.40

Finding the Fourth Proportional to 12,420.40, 18,628.80 and 3,654.40

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Solution

The fourth proportional to 12,420.40, 18,628.80 and 3,654.40 is: 5,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.40 : 18,628.80 = 3,654.40 : x
  2. Step 2: Convert to fraction form
    12,420.40/18,628.80 = 3,654.40/x
  3. Step 3: Cross multiply
    12,420.40x = 18,628.80 × 3,654.40
  4. Step 4: Simplify right side
    12,420.40x = 68,077,086.72
  5. Step 5: Solve for x
    x = 68,077,086.72/12,420.40
  6. Step 6: Final answer
    x = 5,481.07

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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.