Home / 12,421.32-18,635.76-3,656.31

Finding the Fourth Proportional to 12,421.32, 18,635.76 and 3,656.31

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Solution

The fourth proportional to 12,421.32, 18,635.76 and 3,656.31 is: 5,485.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.32 : 18,635.76 = 3,656.31 : x
  2. Step 2: Convert to fraction form
    12,421.32/18,635.76 = 3,656.31/x
  3. Step 3: Cross multiply
    12,421.32x = 18,635.76 × 3,656.31
  4. Step 4: Simplify right side
    12,421.32x = 68,138,115.65
  5. Step 5: Solve for x
    x = 68,138,115.65/12,421.32
  6. Step 6: Final answer
    x = 5,485.58

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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.