Home / 21,347.22-29,459.18-11,915.78

Finding the Fourth Proportional to 21,347.22, 29,459.18 and 11,915.78

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Solution

The fourth proportional to 21,347.22, 29,459.18 and 11,915.78 is: 16,443.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.22 : 29,459.18 = 11,915.78 : x
  2. Step 2: Convert to fraction form
    21,347.22/29,459.18 = 11,915.78/x
  3. Step 3: Cross multiply
    21,347.22x = 29,459.18 × 11,915.78
  4. Step 4: Simplify right side
    21,347.22x = 351,029,107.86
  5. Step 5: Solve for x
    x = 351,029,107.86/21,347.22
  6. Step 6: Final answer
    x = 16,443.79

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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.