Home / 21,240.96-29,308.32-12,858.24

Finding the Fourth Proportional to 21,240.96, 29,308.32 and 12,858.24

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Solution

The fourth proportional to 21,240.96, 29,308.32 and 12,858.24 is: 17,741.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.96 : 29,308.32 = 12,858.24 : x
  2. Step 2: Convert to fraction form
    21,240.96/29,308.32 = 12,858.24/x
  3. Step 3: Cross multiply
    21,240.96x = 29,308.32 × 12,858.24
  4. Step 4: Simplify right side
    21,240.96x = 376,853,412.56
  5. Step 5: Solve for x
    x = 376,853,412.56/21,240.96
  6. Step 6: Final answer
    x = 17,741.83

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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.