Home / 21,119.67-29,145.02-12,168.90

Finding the Fourth Proportional to 21,119.67, 29,145.02 and 12,168.90

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Solution

The fourth proportional to 21,119.67, 29,145.02 and 12,168.90 is: 16,793.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.67 : 29,145.02 = 12,168.90 : x
  2. Step 2: Convert to fraction form
    21,119.67/29,145.02 = 12,168.90/x
  3. Step 3: Cross multiply
    21,119.67x = 29,145.02 × 12,168.90
  4. Step 4: Simplify right side
    21,119.67x = 354,662,773.03
  5. Step 5: Solve for x
    x = 354,662,773.03/21,119.67
  6. Step 6: Final answer
    x = 16,793.01

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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.