Home / 21,118.81-29,151.24-12,169.88

Finding the Fourth Proportional to 21,118.81, 29,151.24 and 12,169.88

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Solution

The fourth proportional to 21,118.81, 29,151.24 and 12,169.88 is: 16,798.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.81 : 29,151.24 = 12,169.88 : x
  2. Step 2: Convert to fraction form
    21,118.81/29,151.24 = 12,169.88/x
  3. Step 3: Cross multiply
    21,118.81x = 29,151.24 × 12,169.88
  4. Step 4: Simplify right side
    21,118.81x = 354,767,079.03
  5. Step 5: Solve for x
    x = 354,767,079.03/21,118.81
  6. Step 6: Final answer
    x = 16,798.63

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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.