Home / 21,129.16-31,694.16-6,338.32

Finding the Fourth Proportional to 21,129.16, 31,694.16 and 6,338.32

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Solution

The fourth proportional to 21,129.16, 31,694.16 and 6,338.32 is: 9,507.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.16 : 31,694.16 = 6,338.32 : x
  2. Step 2: Convert to fraction form
    21,129.16/31,694.16 = 6,338.32/x
  3. Step 3: Cross multiply
    21,129.16x = 31,694.16 × 6,338.32
  4. Step 4: Simplify right side
    21,129.16x = 200,887,728.21
  5. Step 5: Solve for x
    x = 200,887,728.21/21,129.16
  6. Step 6: Final answer
    x = 9,507.61

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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.