Home / 21,388.51-29,513.56-11,827.09

Finding the Fourth Proportional to 21,388.51, 29,513.56 and 11,827.09

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Solution

The fourth proportional to 21,388.51, 29,513.56 and 11,827.09 is: 16,319.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.51 : 29,513.56 = 11,827.09 : x
  2. Step 2: Convert to fraction form
    21,388.51/29,513.56 = 11,827.09/x
  3. Step 3: Cross multiply
    21,388.51x = 29,513.56 × 11,827.09
  4. Step 4: Simplify right side
    21,388.51x = 349,059,530.34
  5. Step 5: Solve for x
    x = 349,059,530.34/21,388.51
  6. Step 6: Final answer
    x = 16,319.96

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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.