Home / 21,110.20-29,132.22-11,679.28

Finding the Fourth Proportional to 21,110.20, 29,132.22 and 11,679.28

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Solution

The fourth proportional to 21,110.20, 29,132.22 and 11,679.28 is: 16,117.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.20 : 29,132.22 = 11,679.28 : x
  2. Step 2: Convert to fraction form
    21,110.20/29,132.22 = 11,679.28/x
  3. Step 3: Cross multiply
    21,110.20x = 29,132.22 × 11,679.28
  4. Step 4: Simplify right side
    21,110.20x = 340,243,354.40
  5. Step 5: Solve for x
    x = 340,243,354.40/21,110.20
  6. Step 6: Final answer
    x = 16,117.49

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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.