Home / 21,421.70-29,562.03-11,990.25

Finding the Fourth Proportional to 21,421.70, 29,562.03 and 11,990.25

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Solution

The fourth proportional to 21,421.70, 29,562.03 and 11,990.25 is: 16,546.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.70 : 29,562.03 = 11,990.25 : x
  2. Step 2: Convert to fraction form
    21,421.70/29,562.03 = 11,990.25/x
  3. Step 3: Cross multiply
    21,421.70x = 29,562.03 × 11,990.25
  4. Step 4: Simplify right side
    21,421.70x = 354,456,130.21
  5. Step 5: Solve for x
    x = 354,456,130.21/21,421.70
  6. Step 6: Final answer
    x = 16,546.59

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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.