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Finding the Fourth Proportional to 21,612.52, 29,826.11 and 12,180.88

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Solution

The fourth proportional to 21,612.52, 29,826.11 and 12,180.88 is: 16,810.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,612.52 : 29,826.11 = 12,180.88 : x
  2. Step 2: Convert to fraction form
    21,612.52/29,826.11 = 12,180.88/x
  3. Step 3: Cross multiply
    21,612.52x = 29,826.11 × 12,180.88
  4. Step 4: Simplify right side
    21,612.52x = 363,308,056.74
  5. Step 5: Solve for x
    x = 363,308,056.74/21,612.52
  6. Step 6: Final answer
    x = 16,810.08

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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.