Home / 21,289.88-29,380.02-12,342.58

Finding the Fourth Proportional to 21,289.88, 29,380.02 and 12,342.58

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Solution

The fourth proportional to 21,289.88, 29,380.02 and 12,342.58 is: 17,032.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.88 : 29,380.02 = 12,342.58 : x
  2. Step 2: Convert to fraction form
    21,289.88/29,380.02 = 12,342.58/x
  3. Step 3: Cross multiply
    21,289.88x = 29,380.02 × 12,342.58
  4. Step 4: Simplify right side
    21,289.88x = 362,625,247.25
  5. Step 5: Solve for x
    x = 362,625,247.25/21,289.88
  6. Step 6: Final answer
    x = 17,032.75

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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.