Home / 21,660.11-29,890.59-12,100.15

Finding the Fourth Proportional to 21,660.11, 29,890.59 and 12,100.15

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Solution

The fourth proportional to 21,660.11, 29,890.59 and 12,100.15 is: 16,698.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.11 : 29,890.59 = 12,100.15 : x
  2. Step 2: Convert to fraction form
    21,660.11/29,890.59 = 12,100.15/x
  3. Step 3: Cross multiply
    21,660.11x = 29,890.59 × 12,100.15
  4. Step 4: Simplify right side
    21,660.11x = 361,680,614.58
  5. Step 5: Solve for x
    x = 361,680,614.58/21,660.11
  6. Step 6: Final answer
    x = 16,698.01

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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.