Home / 21,089.87-29,103.71-11,530.05

Finding the Fourth Proportional to 21,089.87, 29,103.71 and 11,530.05

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Solution

The fourth proportional to 21,089.87, 29,103.71 and 11,530.05 is: 15,911.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.87 : 29,103.71 = 11,530.05 : x
  2. Step 2: Convert to fraction form
    21,089.87/29,103.71 = 11,530.05/x
  3. Step 3: Cross multiply
    21,089.87x = 29,103.71 × 11,530.05
  4. Step 4: Simplify right side
    21,089.87x = 335,567,064.70
  5. Step 5: Solve for x
    x = 335,567,064.70/21,089.87
  6. Step 6: Final answer
    x = 15,911.29

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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.