Home / 21,461.09-29,615.75-11,900.82

Finding the Fourth Proportional to 21,461.09, 29,615.75 and 11,900.82

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Solution

The fourth proportional to 21,461.09, 29,615.75 and 11,900.82 is: 16,422.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,461.09 : 29,615.75 = 11,900.82 : x
  2. Step 2: Convert to fraction form
    21,461.09/29,615.75 = 11,900.82/x
  3. Step 3: Cross multiply
    21,461.09x = 29,615.75 × 11,900.82
  4. Step 4: Simplify right side
    21,461.09x = 352,451,873.04
  5. Step 5: Solve for x
    x = 352,451,873.04/21,461.09
  6. Step 6: Final answer
    x = 16,422.83

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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.