Home / 21,005.09-31,507.89-6,214.32

Finding the Fourth Proportional to 21,005.09, 31,507.89 and 6,214.32

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Solution

The fourth proportional to 21,005.09, 31,507.89 and 6,214.32 is: 9,321.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.09 : 31,507.89 = 6,214.32 : x
  2. Step 2: Convert to fraction form
    21,005.09/31,507.89 = 6,214.32/x
  3. Step 3: Cross multiply
    21,005.09x = 31,507.89 × 6,214.32
  4. Step 4: Simplify right side
    21,005.09x = 195,800,087.68
  5. Step 5: Solve for x
    x = 195,800,087.68/21,005.09
  6. Step 6: Final answer
    x = 9,321.55

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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.