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Finding the Fourth Proportional to 20,649.59, 28,642.64 and 19,941.54

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Solution

The fourth proportional to 20,649.59, 28,642.64 and 19,941.54 is: 27,660.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.59 : 28,642.64 = 19,941.54 : x
  2. Step 2: Convert to fraction form
    20,649.59/28,642.64 = 19,941.54/x
  3. Step 3: Cross multiply
    20,649.59x = 28,642.64 × 19,941.54
  4. Step 4: Simplify right side
    20,649.59x = 571,178,251.56
  5. Step 5: Solve for x
    x = 571,178,251.56/20,649.59
  6. Step 6: Final answer
    x = 27,660.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.