Home / 21,308.49-31,959.77-11,308.86

Finding the Fourth Proportional to 21,308.49, 31,959.77 and 11,308.86

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Solution

The fourth proportional to 21,308.49, 31,959.77 and 11,308.86 is: 16,961.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.49 : 31,959.77 = 11,308.86 : x
  2. Step 2: Convert to fraction form
    21,308.49/31,959.77 = 11,308.86/x
  3. Step 3: Cross multiply
    21,308.49x = 31,959.77 × 11,308.86
  4. Step 4: Simplify right side
    21,308.49x = 361,428,564.56
  5. Step 5: Solve for x
    x = 361,428,564.56/21,308.49
  6. Step 6: Final answer
    x = 16,961.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.