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Finding the Fourth Proportional to 12,586.70, 18,880.05 and 11,204.30

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Solution

The fourth proportional to 12,586.70, 18,880.05 and 11,204.30 is: 16,806.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.70 : 18,880.05 = 11,204.30 : x
  2. Step 2: Convert to fraction form
    12,586.70/18,880.05 = 11,204.30/x
  3. Step 3: Cross multiply
    12,586.70x = 18,880.05 × 11,204.30
  4. Step 4: Simplify right side
    12,586.70x = 211,537,744.22
  5. Step 5: Solve for x
    x = 211,537,744.22/12,586.70
  6. Step 6: Final answer
    x = 16,806.45

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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.