Home / 21,330.62-29,434.21-11,899.79

Finding the Fourth Proportional to 21,330.62, 29,434.21 and 11,899.79

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Solution

The fourth proportional to 21,330.62, 29,434.21 and 11,899.79 is: 16,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.62 : 29,434.21 = 11,899.79 : x
  2. Step 2: Convert to fraction form
    21,330.62/29,434.21 = 11,899.79/x
  3. Step 3: Cross multiply
    21,330.62x = 29,434.21 × 11,899.79
  4. Step 4: Simplify right side
    21,330.62x = 350,260,740.90
  5. Step 5: Solve for x
    x = 350,260,740.90/21,330.62
  6. Step 6: Final answer
    x = 16,420.56

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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.