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Finding the Fourth Proportional to 12,791.70, 19,216.35 and 12,302.10

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Solution

The fourth proportional to 12,791.70, 19,216.35 and 12,302.10 is: 18,480.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.70 : 19,216.35 = 12,302.10 : x
  2. Step 2: Convert to fraction form
    12,791.70/19,216.35 = 12,302.10/x
  3. Step 3: Cross multiply
    12,791.70x = 19,216.35 × 12,302.10
  4. Step 4: Simplify right side
    12,791.70x = 236,401,459.34
  5. Step 5: Solve for x
    x = 236,401,459.34/12,791.70
  6. Step 6: Final answer
    x = 18,480.85

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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.