Home / 21,245.83-29,318.09-11,813.78

Finding the Fourth Proportional to 21,245.83, 29,318.09 and 11,813.78

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Solution

The fourth proportional to 21,245.83, 29,318.09 and 11,813.78 is: 16,302.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.83 : 29,318.09 = 11,813.78 : x
  2. Step 2: Convert to fraction form
    21,245.83/29,318.09 = 11,813.78/x
  3. Step 3: Cross multiply
    21,245.83x = 29,318.09 × 11,813.78
  4. Step 4: Simplify right side
    21,245.83x = 346,357,465.28
  5. Step 5: Solve for x
    x = 346,357,465.28/21,245.83
  6. Step 6: Final answer
    x = 16,302.37

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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.