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Finding the Fourth Proportional to 20,797, 28,699.86 and 11,365.57

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Solution

The fourth proportional to 20,797, 28,699.86 and 11,365.57 is: 15,684.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797 : 28,699.86 = 11,365.57 : x
  2. Step 2: Convert to fraction form
    20,797/28,699.86 = 11,365.57/x
  3. Step 3: Cross multiply
    20,797x = 28,699.86 × 11,365.57
  4. Step 4: Simplify right side
    20,797x = 326,190,267.82
  5. Step 5: Solve for x
    x = 326,190,267.82/20,797
  6. Step 6: Final answer
    x = 15,684.49

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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.