Home / 21,143.45-29,177.94-12,759.95

Finding the Fourth Proportional to 21,143.45, 29,177.94 and 12,759.95

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Solution

The fourth proportional to 21,143.45, 29,177.94 and 12,759.95 is: 17,608.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.45 : 29,177.94 = 12,759.95 : x
  2. Step 2: Convert to fraction form
    21,143.45/29,177.94 = 12,759.95/x
  3. Step 3: Cross multiply
    21,143.45x = 29,177.94 × 12,759.95
  4. Step 4: Simplify right side
    21,143.45x = 372,308,909.61
  5. Step 5: Solve for x
    x = 372,308,909.61/21,143.45
  6. Step 6: Final answer
    x = 17,608.72

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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.