Home / 15,494.82-21,382.74-8,421.18

Finding the Fourth Proportional to 15,494.82, 21,382.74 and 8,421.18

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Solution

The fourth proportional to 15,494.82, 21,382.74 and 8,421.18 is: 11,621.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.82 : 21,382.74 = 8,421.18 : x
  2. Step 2: Convert to fraction form
    15,494.82/21,382.74 = 8,421.18/x
  3. Step 3: Cross multiply
    15,494.82x = 21,382.74 × 8,421.18
  4. Step 4: Simplify right side
    15,494.82x = 180,067,902.43
  5. Step 5: Solve for x
    x = 180,067,902.43/15,494.82
  6. Step 6: Final answer
    x = 11,621.17

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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.