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Finding the Fourth Proportional to 20,592.61, 28,417.61 and 11,517.86

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Solution

The fourth proportional to 20,592.61, 28,417.61 and 11,517.86 is: 15,894.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,592.61 : 28,417.61 = 11,517.86 : x
  2. Step 2: Convert to fraction form
    20,592.61/28,417.61 = 11,517.86/x
  3. Step 3: Cross multiply
    20,592.61x = 28,417.61 × 11,517.86
  4. Step 4: Simplify right side
    20,592.61x = 327,310,001.07
  5. Step 5: Solve for x
    x = 327,310,001.07/20,592.61
  6. Step 6: Final answer
    x = 15,894.54

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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.