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Finding the Fourth Proportional to 12,586.35, 17,368.80 and 6,921.09

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Solution

The fourth proportional to 12,586.35, 17,368.80 and 6,921.09 is: 9,550.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.35 : 17,368.80 = 6,921.09 : x
  2. Step 2: Convert to fraction form
    12,586.35/17,368.80 = 6,921.09/x
  3. Step 3: Cross multiply
    12,586.35x = 17,368.80 × 6,921.09
  4. Step 4: Simplify right side
    12,586.35x = 120,211,027.99
  5. Step 5: Solve for x
    x = 120,211,027.99/12,586.35
  6. Step 6: Final answer
    x = 9,550.90

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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.