Home / 21,330.66-29,436.36-11,899.84

Finding the Fourth Proportional to 21,330.66, 29,436.36 and 11,899.84

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Solution

The fourth proportional to 21,330.66, 29,436.36 and 11,899.84 is: 16,421.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.66 : 29,436.36 = 11,899.84 : x
  2. Step 2: Convert to fraction form
    21,330.66/29,436.36 = 11,899.84/x
  3. Step 3: Cross multiply
    21,330.66x = 29,436.36 × 11,899.84
  4. Step 4: Simplify right side
    21,330.66x = 350,287,974.18
  5. Step 5: Solve for x
    x = 350,287,974.18/21,330.66
  6. Step 6: Final answer
    x = 16,421.81

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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.