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Finding the Fourth Proportional to 18,704.80, 25,801.74 and 11,988.04

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Solution

The fourth proportional to 18,704.80, 25,801.74 and 11,988.04 is: 16,536.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.80 : 25,801.74 = 11,988.04 : x
  2. Step 2: Convert to fraction form
    18,704.80/25,801.74 = 11,988.04/x
  3. Step 3: Cross multiply
    18,704.80x = 25,801.74 × 11,988.04
  4. Step 4: Simplify right side
    18,704.80x = 309,312,291.19
  5. Step 5: Solve for x
    x = 309,312,291.19/18,704.80
  6. Step 6: Final answer
    x = 16,536.52

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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.