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Finding the Fourth Proportional to 20,959.88, 28,925.24 and 11,529.05

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Solution

The fourth proportional to 20,959.88, 28,925.24 and 11,529.05 is: 15,910.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.88 : 28,925.24 = 11,529.05 : x
  2. Step 2: Convert to fraction form
    20,959.88/28,925.24 = 11,529.05/x
  3. Step 3: Cross multiply
    20,959.88x = 28,925.24 × 11,529.05
  4. Step 4: Simplify right side
    20,959.88x = 333,480,335.95
  5. Step 5: Solve for x
    x = 333,480,335.95/20,959.88
  6. Step 6: Final answer
    x = 15,910.42

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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.