Home / 21,110.50-29,129.97-11,677.78

Finding the Fourth Proportional to 21,110.50, 29,129.97 and 11,677.78

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Solution

The fourth proportional to 21,110.50, 29,129.97 and 11,677.78 is: 16,113.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.50 : 29,129.97 = 11,677.78 : x
  2. Step 2: Convert to fraction form
    21,110.50/29,129.97 = 11,677.78/x
  3. Step 3: Cross multiply
    21,110.50x = 29,129.97 × 11,677.78
  4. Step 4: Simplify right side
    21,110.50x = 340,173,381.07
  5. Step 5: Solve for x
    x = 340,173,381.07/21,110.50
  6. Step 6: Final answer
    x = 16,113.94

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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.