Home / 21,917.07-30,238.16-12,478.95

Finding the Fourth Proportional to 21,917.07, 30,238.16 and 12,478.95

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Solution

The fourth proportional to 21,917.07, 30,238.16 and 12,478.95 is: 17,216.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.07 : 30,238.16 = 12,478.95 : x
  2. Step 2: Convert to fraction form
    21,917.07/30,238.16 = 12,478.95/x
  3. Step 3: Cross multiply
    21,917.07x = 30,238.16 × 12,478.95
  4. Step 4: Simplify right side
    21,917.07x = 377,340,486.73
  5. Step 5: Solve for x
    x = 377,340,486.73/21,917.07
  6. Step 6: Final answer
    x = 17,216.74

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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.