Home / 21,308.40-29,404.98-11,876.76

Finding the Fourth Proportional to 21,308.40, 29,404.98 and 11,876.76

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Solution

The fourth proportional to 21,308.40, 29,404.98 and 11,876.76 is: 16,389.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.40 : 29,404.98 = 11,876.76 : x
  2. Step 2: Convert to fraction form
    21,308.40/29,404.98 = 11,876.76/x
  3. Step 3: Cross multiply
    21,308.40x = 29,404.98 × 11,876.76
  4. Step 4: Simplify right side
    21,308.40x = 349,235,890.26
  5. Step 5: Solve for x
    x = 349,235,890.26/21,308.40
  6. Step 6: Final answer
    x = 16,389.59

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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.