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Finding the Fourth Proportional to 20,773.68, 28,669.84 and 12,278.56

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Solution

The fourth proportional to 20,773.68, 28,669.84 and 12,278.56 is: 16,945.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,773.68 : 28,669.84 = 12,278.56 : x
  2. Step 2: Convert to fraction form
    20,773.68/28,669.84 = 12,278.56/x
  3. Step 3: Cross multiply
    20,773.68x = 28,669.84 × 12,278.56
  4. Step 4: Simplify right side
    20,773.68x = 352,024,350.63
  5. Step 5: Solve for x
    x = 352,024,350.63/20,773.68
  6. Step 6: Final answer
    x = 16,945.69

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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.