Home / 21,139.03-29,172.32-11,708.20

Finding the Fourth Proportional to 21,139.03, 29,172.32 and 11,708.20

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Solution

The fourth proportional to 21,139.03, 29,172.32 and 11,708.20 is: 16,157.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.03 : 29,172.32 = 11,708.20 : x
  2. Step 2: Convert to fraction form
    21,139.03/29,172.32 = 11,708.20/x
  3. Step 3: Cross multiply
    21,139.03x = 29,172.32 × 11,708.20
  4. Step 4: Simplify right side
    21,139.03x = 341,555,357.02
  5. Step 5: Solve for x
    x = 341,555,357.02/21,139.03
  6. Step 6: Final answer
    x = 16,157.57

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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.