Home / 21,115.04-29,112.29-13,548.02

Finding the Fourth Proportional to 21,115.04, 29,112.29 and 13,548.02

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Solution

The fourth proportional to 21,115.04, 29,112.29 and 13,548.02 is: 18,679.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.04 : 29,112.29 = 13,548.02 : x
  2. Step 2: Convert to fraction form
    21,115.04/29,112.29 = 13,548.02/x
  3. Step 3: Cross multiply
    21,115.04x = 29,112.29 × 13,548.02
  4. Step 4: Simplify right side
    21,115.04x = 394,413,887.17
  5. Step 5: Solve for x
    x = 394,413,887.17/21,115.04
  6. Step 6: Final answer
    x = 18,679.29

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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.