Home / 12,421.32-18,631.96-3,187.32

Finding the Fourth Proportional to 12,421.32, 18,631.96 and 3,187.32

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Solution

The fourth proportional to 12,421.32, 18,631.96 and 3,187.32 is: 4,780.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.32 : 18,631.96 = 3,187.32 : x
  2. Step 2: Convert to fraction form
    12,421.32/18,631.96 = 3,187.32/x
  3. Step 3: Cross multiply
    12,421.32x = 18,631.96 × 3,187.32
  4. Step 4: Simplify right side
    12,421.32x = 59,386,018.75
  5. Step 5: Solve for x
    x = 59,386,018.75/12,421.32
  6. Step 6: Final answer
    x = 4,780.97

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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.