Home / 21,308.88-29,405.04-11,877.12

Finding the Fourth Proportional to 21,308.88, 29,405.04 and 11,877.12

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Solution

The fourth proportional to 21,308.88, 29,405.04 and 11,877.12 is: 16,389.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.88 : 29,405.04 = 11,877.12 : x
  2. Step 2: Convert to fraction form
    21,308.88/29,405.04 = 11,877.12/x
  3. Step 3: Cross multiply
    21,308.88x = 29,405.04 × 11,877.12
  4. Step 4: Simplify right side
    21,308.88x = 349,247,188.68
  5. Step 5: Solve for x
    x = 349,247,188.68/21,308.88
  6. Step 6: Final answer
    x = 16,389.75

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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.