Home / 21,109.75-29,128.93-11,677.03

Finding the Fourth Proportional to 21,109.75, 29,128.93 and 11,677.03

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Solution

The fourth proportional to 21,109.75, 29,128.93 and 11,677.03 is: 16,112.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.75 : 29,128.93 = 11,677.03 : x
  2. Step 2: Convert to fraction form
    21,109.75/29,128.93 = 11,677.03/x
  3. Step 3: Cross multiply
    21,109.75x = 29,128.93 × 11,677.03
  4. Step 4: Simplify right side
    21,109.75x = 340,139,389.48
  5. Step 5: Solve for x
    x = 340,139,389.48/21,109.75
  6. Step 6: Final answer
    x = 16,112.90

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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.