Home / 21,822.75-30,115.40-11,886.75

Finding the Fourth Proportional to 21,822.75, 30,115.40 and 11,886.75

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Solution

The fourth proportional to 21,822.75, 30,115.40 and 11,886.75 is: 16,403.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,822.75 : 30,115.40 = 11,886.75 : x
  2. Step 2: Convert to fraction form
    21,822.75/30,115.40 = 11,886.75/x
  3. Step 3: Cross multiply
    21,822.75x = 30,115.40 × 11,886.75
  4. Step 4: Simplify right side
    21,822.75x = 357,974,171.52
  5. Step 5: Solve for x
    x = 357,974,171.52/21,822.75
  6. Step 6: Final answer
    x = 16,403.72

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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.