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Finding the Fourth Proportional to 20,658.42, 28,506.30 and 11,704.01

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Solution

The fourth proportional to 20,658.42, 28,506.30 and 11,704.01 is: 16,150.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.42 : 28,506.30 = 11,704.01 : x
  2. Step 2: Convert to fraction form
    20,658.42/28,506.30 = 11,704.01/x
  3. Step 3: Cross multiply
    20,658.42x = 28,506.30 × 11,704.01
  4. Step 4: Simplify right side
    20,658.42x = 333,637,877.73
  5. Step 5: Solve for x
    x = 333,637,877.73/20,658.42
  6. Step 6: Final answer
    x = 16,150.21

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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.