Home / 21,421.90-29,562.19-11,990.53

Finding the Fourth Proportional to 21,421.90, 29,562.19 and 11,990.53

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Solution

The fourth proportional to 21,421.90, 29,562.19 and 11,990.53 is: 16,546.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.90 : 29,562.19 = 11,990.53 : x
  2. Step 2: Convert to fraction form
    21,421.90/29,562.19 = 11,990.53/x
  3. Step 3: Cross multiply
    21,421.90x = 29,562.19 × 11,990.53
  4. Step 4: Simplify right side
    21,421.90x = 354,466,326.06
  5. Step 5: Solve for x
    x = 354,466,326.06/21,421.90
  6. Step 6: Final answer
    x = 16,546.91

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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.