Home / 21,828.71-30,126.18-12,268.61

Finding the Fourth Proportional to 21,828.71, 30,126.18 and 12,268.61

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Solution

The fourth proportional to 21,828.71, 30,126.18 and 12,268.61 is: 16,932.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.71 : 30,126.18 = 12,268.61 : x
  2. Step 2: Convert to fraction form
    21,828.71/30,126.18 = 12,268.61/x
  3. Step 3: Cross multiply
    21,828.71x = 30,126.18 × 12,268.61
  4. Step 4: Simplify right side
    21,828.71x = 369,606,353.21
  5. Step 5: Solve for x
    x = 369,606,353.21/21,828.71
  6. Step 6: Final answer
    x = 16,932.12

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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.