Home / 21,330.81-29,436.31-11,770.79

Finding the Fourth Proportional to 21,330.81, 29,436.31 and 11,770.79

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Solution

The fourth proportional to 21,330.81, 29,436.31 and 11,770.79 is: 16,243.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.81 : 29,436.31 = 11,770.79 : x
  2. Step 2: Convert to fraction form
    21,330.81/29,436.31 = 11,770.79/x
  3. Step 3: Cross multiply
    21,330.81x = 29,436.31 × 11,770.79
  4. Step 4: Simplify right side
    21,330.81x = 346,488,490.92
  5. Step 5: Solve for x
    x = 346,488,490.92/21,330.81
  6. Step 6: Final answer
    x = 16,243.57

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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.