Home / 21,863.82-30,171.33-12,303.90

Finding the Fourth Proportional to 21,863.82, 30,171.33 and 12,303.90

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Solution

The fourth proportional to 21,863.82, 30,171.33 and 12,303.90 is: 16,978.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.82 : 30,171.33 = 12,303.90 : x
  2. Step 2: Convert to fraction form
    21,863.82/30,171.33 = 12,303.90/x
  3. Step 3: Cross multiply
    21,863.82x = 30,171.33 × 12,303.90
  4. Step 4: Simplify right side
    21,863.82x = 371,225,027.19
  5. Step 5: Solve for x
    x = 371,225,027.19/21,863.82
  6. Step 6: Final answer
    x = 16,978.96

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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.