Home / 21,814.32-30,103.92-11,878.32

Finding the Fourth Proportional to 21,814.32, 30,103.92 and 11,878.32

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Solution

The fourth proportional to 21,814.32, 30,103.92 and 11,878.32 is: 16,392.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.32 : 30,103.92 = 11,878.32 : x
  2. Step 2: Convert to fraction form
    21,814.32/30,103.92 = 11,878.32/x
  3. Step 3: Cross multiply
    21,814.32x = 30,103.92 × 11,878.32
  4. Step 4: Simplify right side
    21,814.32x = 357,583,995.01
  5. Step 5: Solve for x
    x = 357,583,995.01/21,814.32
  6. Step 6: Final answer
    x = 16,392.17

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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.