Home / 21,305.19-31,961.84-9,618.38

Finding the Fourth Proportional to 21,305.19, 31,961.84 and 9,618.38

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Solution

The fourth proportional to 21,305.19, 31,961.84 and 9,618.38 is: 14,429.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.19 : 31,961.84 = 9,618.38 : x
  2. Step 2: Convert to fraction form
    21,305.19/31,961.84 = 9,618.38/x
  3. Step 3: Cross multiply
    21,305.19x = 31,961.84 × 9,618.38
  4. Step 4: Simplify right side
    21,305.19x = 307,420,914.72
  5. Step 5: Solve for x
    x = 307,420,914.72/21,305.19
  6. Step 6: Final answer
    x = 14,429.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.