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Finding the Fourth Proportional to 20,706.99, 28,574.87 and 12,654.11

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Solution

The fourth proportional to 20,706.99, 28,574.87 and 12,654.11 is: 17,462.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.99 : 28,574.87 = 12,654.11 : x
  2. Step 2: Convert to fraction form
    20,706.99/28,574.87 = 12,654.11/x
  3. Step 3: Cross multiply
    20,706.99x = 28,574.87 × 12,654.11
  4. Step 4: Simplify right side
    20,706.99x = 361,589,548.22
  5. Step 5: Solve for x
    x = 361,589,548.22/20,706.99
  6. Step 6: Final answer
    x = 17,462.20

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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.