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Finding the Fourth Proportional to 20,648.52, 28,495.62 and 11,697.48

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Solution

The fourth proportional to 20,648.52, 28,495.62 and 11,697.48 is: 16,142.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.52 : 28,495.62 = 11,697.48 : x
  2. Step 2: Convert to fraction form
    20,648.52/28,495.62 = 11,697.48/x
  3. Step 3: Cross multiply
    20,648.52x = 28,495.62 × 11,697.48
  4. Step 4: Simplify right side
    20,648.52x = 333,326,945.04
  5. Step 5: Solve for x
    x = 333,326,945.04/20,648.52
  6. Step 6: Final answer
    x = 16,142.90

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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.