Home / 21,308.23-29,405.49-11,877.40

Finding the Fourth Proportional to 21,308.23, 29,405.49 and 11,877.40

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Solution

The fourth proportional to 21,308.23, 29,405.49 and 11,877.40 is: 16,390.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.23 : 29,405.49 = 11,877.40 : x
  2. Step 2: Convert to fraction form
    21,308.23/29,405.49 = 11,877.40/x
  3. Step 3: Cross multiply
    21,308.23x = 29,405.49 × 11,877.40
  4. Step 4: Simplify right side
    21,308.23x = 349,260,766.93
  5. Step 5: Solve for x
    x = 349,260,766.93/21,308.23
  6. Step 6: Final answer
    x = 16,390.89

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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.