Home / 20,838.79-28,757.56-11,886.06

Finding the Fourth Proportional to 20,838.79, 28,757.56 and 11,886.06

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Solution

The fourth proportional to 20,838.79, 28,757.56 and 11,886.06 is: 16,402.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.79 : 28,757.56 = 11,886.06 : x
  2. Step 2: Convert to fraction form
    20,838.79/28,757.56 = 11,886.06/x
  3. Step 3: Cross multiply
    20,838.79x = 28,757.56 × 11,886.06
  4. Step 4: Simplify right side
    20,838.79x = 341,814,083.61
  5. Step 5: Solve for x
    x = 341,814,083.61/20,838.79
  6. Step 6: Final answer
    x = 16,402.78

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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.