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Finding the Fourth Proportional to 21,658.77, 32,343.66 and 20,551.68

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Solution

The fourth proportional to 21,658.77, 32,343.66 and 20,551.68 is: 30,690.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.77 : 32,343.66 = 20,551.68 : x
  2. Step 2: Convert to fraction form
    21,658.77/32,343.66 = 20,551.68/x
  3. Step 3: Cross multiply
    21,658.77x = 32,343.66 × 20,551.68
  4. Step 4: Simplify right side
    21,658.77x = 664,716,550.35
  5. Step 5: Solve for x
    x = 664,716,550.35/21,658.77
  6. Step 6: Final answer
    x = 30,690.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.