Home / 21,007.70-31,475.10-13,608.35

Finding the Fourth Proportional to 21,007.70, 31,475.10 and 13,608.35

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Solution

The fourth proportional to 21,007.70, 31,475.10 and 13,608.35 is: 20,388.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.70 : 31,475.10 = 13,608.35 : x
  2. Step 2: Convert to fraction form
    21,007.70/31,475.10 = 13,608.35/x
  3. Step 3: Cross multiply
    21,007.70x = 31,475.10 × 13,608.35
  4. Step 4: Simplify right side
    21,007.70x = 428,324,177.09
  5. Step 5: Solve for x
    x = 428,324,177.09/21,007.70
  6. Step 6: Final answer
    x = 20,388.91

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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.