Home / 15,494.96-21,382.16-8,421.34

Finding the Fourth Proportional to 15,494.96, 21,382.16 and 8,421.34

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Solution

The fourth proportional to 15,494.96, 21,382.16 and 8,421.34 is: 11,620.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.96 : 21,382.16 = 8,421.34 : x
  2. Step 2: Convert to fraction form
    15,494.96/21,382.16 = 8,421.34/x
  3. Step 3: Cross multiply
    15,494.96x = 21,382.16 × 8,421.34
  4. Step 4: Simplify right side
    15,494.96x = 180,066,439.29
  5. Step 5: Solve for x
    x = 180,066,439.29/15,494.96
  6. Step 6: Final answer
    x = 11,620.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.