Home / 21,512.15-29,686.33-11,951.99

Finding the Fourth Proportional to 21,512.15, 29,686.33 and 11,951.99

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Solution

The fourth proportional to 21,512.15, 29,686.33 and 11,951.99 is: 16,493.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.15 : 29,686.33 = 11,951.99 : x
  2. Step 2: Convert to fraction form
    21,512.15/29,686.33 = 11,951.99/x
  3. Step 3: Cross multiply
    21,512.15x = 29,686.33 × 11,951.99
  4. Step 4: Simplify right side
    21,512.15x = 354,810,697.13
  5. Step 5: Solve for x
    x = 354,810,697.13/21,512.15
  6. Step 6: Final answer
    x = 16,493.50

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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.