Home / 21,459.07-29,615.25-11,899.90

Finding the Fourth Proportional to 21,459.07, 29,615.25 and 11,899.90

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Solution

The fourth proportional to 21,459.07, 29,615.25 and 11,899.90 is: 16,422.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.07 : 29,615.25 = 11,899.90 : x
  2. Step 2: Convert to fraction form
    21,459.07/29,615.25 = 11,899.90/x
  3. Step 3: Cross multiply
    21,459.07x = 29,615.25 × 11,899.90
  4. Step 4: Simplify right side
    21,459.07x = 352,418,513.48
  5. Step 5: Solve for x
    x = 352,418,513.48/21,459.07
  6. Step 6: Final answer
    x = 16,422.82

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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.