Home / 12,620.10-18,908.55-8,235.30

Finding the Fourth Proportional to 12,620.10, 18,908.55 and 8,235.30

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Solution

The fourth proportional to 12,620.10, 18,908.55 and 8,235.30 is: 12,338.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.10 : 18,908.55 = 8,235.30 : x
  2. Step 2: Convert to fraction form
    12,620.10/18,908.55 = 8,235.30/x
  3. Step 3: Cross multiply
    12,620.10x = 18,908.55 × 8,235.30
  4. Step 4: Simplify right side
    12,620.10x = 155,717,581.82
  5. Step 5: Solve for x
    x = 155,717,581.82/12,620.10
  6. Step 6: Final answer
    x = 12,338.85

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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.