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Finding the Fourth Proportional to 13,855.55, 20,764.17 and 12,002.07

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Solution

The fourth proportional to 13,855.55, 20,764.17 and 12,002.07 is: 17,986.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.55 : 20,764.17 = 12,002.07 : x
  2. Step 2: Convert to fraction form
    13,855.55/20,764.17 = 12,002.07/x
  3. Step 3: Cross multiply
    13,855.55x = 20,764.17 × 12,002.07
  4. Step 4: Simplify right side
    13,855.55x = 249,213,021.83
  5. Step 5: Solve for x
    x = 249,213,021.83/13,855.55
  6. Step 6: Final answer
    x = 17,986.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.