Home / 21,243.36-29,310.48-12,858.24

Finding the Fourth Proportional to 21,243.36, 29,310.48 and 12,858.24

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Solution

The fourth proportional to 21,243.36, 29,310.48 and 12,858.24 is: 17,741.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.36 : 29,310.48 = 12,858.24 : x
  2. Step 2: Convert to fraction form
    21,243.36/29,310.48 = 12,858.24/x
  3. Step 3: Cross multiply
    21,243.36x = 29,310.48 × 12,858.24
  4. Step 4: Simplify right side
    21,243.36x = 376,881,186.36
  5. Step 5: Solve for x
    x = 376,881,186.36/21,243.36
  6. Step 6: Final answer
    x = 17,741.13

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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.