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Finding the Fourth Proportional to 20,354.76, 28,084.86 and 12,799.08

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Solution

The fourth proportional to 20,354.76, 28,084.86 and 12,799.08 is: 17,659.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,354.76 : 28,084.86 = 12,799.08 : x
  2. Step 2: Convert to fraction form
    20,354.76/28,084.86 = 12,799.08/x
  3. Step 3: Cross multiply
    20,354.76x = 28,084.86 × 12,799.08
  4. Step 4: Simplify right side
    20,354.76x = 359,460,369.93
  5. Step 5: Solve for x
    x = 359,460,369.93/20,354.76
  6. Step 6: Final answer
    x = 17,659.77

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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.