Home / 21,029.66-31,535.26-7,872.81

Finding the Fourth Proportional to 21,029.66, 31,535.26 and 7,872.81

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Solution

The fourth proportional to 21,029.66, 31,535.26 and 7,872.81 is: 11,805.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.66 : 31,535.26 = 7,872.81 : x
  2. Step 2: Convert to fraction form
    21,029.66/31,535.26 = 7,872.81/x
  3. Step 3: Cross multiply
    21,029.66x = 31,535.26 × 7,872.81
  4. Step 4: Simplify right side
    21,029.66x = 248,271,110.28
  5. Step 5: Solve for x
    x = 248,271,110.28/21,029.66
  6. Step 6: Final answer
    x = 11,805.76

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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.