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Finding the Fourth Proportional to 20,647.76, 28,500.44 and 13,195.76

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Solution

The fourth proportional to 20,647.76, 28,500.44 and 13,195.76 is: 18,214.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.76 : 28,500.44 = 13,195.76 : x
  2. Step 2: Convert to fraction form
    20,647.76/28,500.44 = 13,195.76/x
  3. Step 3: Cross multiply
    20,647.76x = 28,500.44 × 13,195.76
  4. Step 4: Simplify right side
    20,647.76x = 376,084,966.13
  5. Step 5: Solve for x
    x = 376,084,966.13/20,647.76
  6. Step 6: Final answer
    x = 18,214.32

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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.