Home / 21,308.52-29,405.79-11,876.88

Finding the Fourth Proportional to 21,308.52, 29,405.79 and 11,876.88

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Solution

The fourth proportional to 21,308.52, 29,405.79 and 11,876.88 is: 16,390.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.52 : 29,405.79 = 11,876.88 : x
  2. Step 2: Convert to fraction form
    21,308.52/29,405.79 = 11,876.88/x
  3. Step 3: Cross multiply
    21,308.52x = 29,405.79 × 11,876.88
  4. Step 4: Simplify right side
    21,308.52x = 349,249,039.14
  5. Step 5: Solve for x
    x = 349,249,039.14/21,308.52
  6. Step 6: Final answer
    x = 16,390.11

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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.