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Finding the Fourth Proportional to 13,758.75, 18,987.12 and 9,051.48

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Solution

The fourth proportional to 13,758.75, 18,987.12 and 9,051.48 is: 12,491.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.75 : 18,987.12 = 9,051.48 : x
  2. Step 2: Convert to fraction form
    13,758.75/18,987.12 = 9,051.48/x
  3. Step 3: Cross multiply
    13,758.75x = 18,987.12 × 9,051.48
  4. Step 4: Simplify right side
    13,758.75x = 171,861,536.94
  5. Step 5: Solve for x
    x = 171,861,536.94/13,758.75
  6. Step 6: Final answer
    x = 12,491.07

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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.