Home / 21,917.19-30,238.33-12,479.07

Finding the Fourth Proportional to 21,917.19, 30,238.33 and 12,479.07

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Solution

The fourth proportional to 21,917.19, 30,238.33 and 12,479.07 is: 17,216.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.19 : 30,238.33 = 12,479.07 : x
  2. Step 2: Convert to fraction form
    21,917.19/30,238.33 = 12,479.07/x
  3. Step 3: Cross multiply
    21,917.19x = 30,238.33 × 12,479.07
  4. Step 4: Simplify right side
    21,917.19x = 377,346,236.75
  5. Step 5: Solve for x
    x = 377,346,236.75/21,917.19
  6. Step 6: Final answer
    x = 17,216.91

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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.