Home / 21,154.08-29,191.62-12,660.88

Finding the Fourth Proportional to 21,154.08, 29,191.62 and 12,660.88

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Solution

The fourth proportional to 21,154.08, 29,191.62 and 12,660.88 is: 17,471.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.08 : 29,191.62 = 12,660.88 : x
  2. Step 2: Convert to fraction form
    21,154.08/29,191.62 = 12,660.88/x
  3. Step 3: Cross multiply
    21,154.08x = 29,191.62 × 12,660.88
  4. Step 4: Simplify right side
    21,154.08x = 369,591,556.50
  5. Step 5: Solve for x
    x = 369,591,556.50/21,154.08
  6. Step 6: Final answer
    x = 17,471.41

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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.