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Finding the Fourth Proportional to 13,758.58, 20,536.07 and 12,017.89

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Solution

The fourth proportional to 13,758.58, 20,536.07 and 12,017.89 is: 17,937.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.58 : 20,536.07 = 12,017.89 : x
  2. Step 2: Convert to fraction form
    13,758.58/20,536.07 = 12,017.89/x
  3. Step 3: Cross multiply
    13,758.58x = 20,536.07 × 12,017.89
  4. Step 4: Simplify right side
    13,758.58x = 246,800,230.29
  5. Step 5: Solve for x
    x = 246,800,230.29/13,758.58
  6. Step 6: Final answer
    x = 17,937.91

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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.