Home / 21,271.25-29,355.03-11,711.87

Finding the Fourth Proportional to 21,271.25, 29,355.03 and 11,711.87

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Solution

The fourth proportional to 21,271.25, 29,355.03 and 11,711.87 is: 16,162.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.25 : 29,355.03 = 11,711.87 : x
  2. Step 2: Convert to fraction form
    21,271.25/29,355.03 = 11,711.87/x
  3. Step 3: Cross multiply
    21,271.25x = 29,355.03 × 11,711.87
  4. Step 4: Simplify right side
    21,271.25x = 343,802,148.43
  5. Step 5: Solve for x
    x = 343,802,148.43/21,271.25
  6. Step 6: Final answer
    x = 16,162.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.