Home / 12,320.20-18,480.30-3,555.40

Finding the Fourth Proportional to 12,320.20, 18,480.30 and 3,555.40

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Solution

The fourth proportional to 12,320.20, 18,480.30 and 3,555.40 is: 5,333.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,320.20 : 18,480.30 = 3,555.40 : x
  2. Step 2: Convert to fraction form
    12,320.20/18,480.30 = 3,555.40/x
  3. Step 3: Cross multiply
    12,320.20x = 18,480.30 × 3,555.40
  4. Step 4: Simplify right side
    12,320.20x = 65,704,858.62
  5. Step 5: Solve for x
    x = 65,704,858.62/12,320.20
  6. Step 6: Final answer
    x = 5,333.10

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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.