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Finding the Fourth Proportional to 12,486.70, 18,717.79 and 6,237.35

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Solution

The fourth proportional to 12,486.70, 18,717.79 and 6,237.35 is: 9,349.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.70 : 18,717.79 = 6,237.35 : x
  2. Step 2: Convert to fraction form
    12,486.70/18,717.79 = 6,237.35/x
  3. Step 3: Cross multiply
    12,486.70x = 18,717.79 × 6,237.35
  4. Step 4: Simplify right side
    12,486.70x = 116,749,407.46
  5. Step 5: Solve for x
    x = 116,749,407.46/12,486.70
  6. Step 6: Final answer
    x = 9,349.90

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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.