Home / 21,118.08-29,140.80-12,164.88

Finding the Fourth Proportional to 21,118.08, 29,140.80 and 12,164.88

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Solution

The fourth proportional to 21,118.08, 29,140.80 and 12,164.88 is: 16,786.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.08 : 29,140.80 = 12,164.88 : x
  2. Step 2: Convert to fraction form
    21,118.08/29,140.80 = 12,164.88/x
  3. Step 3: Cross multiply
    21,118.08x = 29,140.80 × 12,164.88
  4. Step 4: Simplify right side
    21,118.08x = 354,494,335.10
  5. Step 5: Solve for x
    x = 354,494,335.10/21,118.08
  6. Step 6: Final answer
    x = 16,786.30

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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.