Home / 21,077.28-29,085.36-11,645.28

Finding the Fourth Proportional to 21,077.28, 29,085.36 and 11,645.28

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Solution

The fourth proportional to 21,077.28, 29,085.36 and 11,645.28 is: 16,069.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.28 : 29,085.36 = 11,645.28 : x
  2. Step 2: Convert to fraction form
    21,077.28/29,085.36 = 11,645.28/x
  3. Step 3: Cross multiply
    21,077.28x = 29,085.36 × 11,645.28
  4. Step 4: Simplify right side
    21,077.28x = 338,707,161.10
  5. Step 5: Solve for x
    x = 338,707,161.10/21,077.28
  6. Step 6: Final answer
    x = 16,069.78

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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.