Home / 21,118.50-29,143.08-11,558.39

Finding the Fourth Proportional to 21,118.50, 29,143.08 and 11,558.39

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Solution

The fourth proportional to 21,118.50, 29,143.08 and 11,558.39 is: 15,950.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.50 : 29,143.08 = 11,558.39 : x
  2. Step 2: Convert to fraction form
    21,118.50/29,143.08 = 11,558.39/x
  3. Step 3: Cross multiply
    21,118.50x = 29,143.08 × 11,558.39
  4. Step 4: Simplify right side
    21,118.50x = 336,846,938.73
  5. Step 5: Solve for x
    x = 336,846,938.73/21,118.50
  6. Step 6: Final answer
    x = 15,950.33

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1.5x scale

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.